623434477 has 4 divisors (see below), whose sum is σ = 623494620. Its totient is φ = 623374336.

The previous prime is 623434463. The next prime is 623434499. The reversal of 623434477 is 774434326.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 774434326 = 2 ⋅387217163.

It can be written as a sum of positive squares in 2 ways, for example, as 122301481 + 501132996 = 11059^2 + 22386^2 .

It is a cyclic number.

It is not a de Polignac number, because 623434477 - 2²³ = 615045869 is a prime.

It is a super-2 number, since 2×623434477² = 777341094224527058, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623438477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10102 + ... + 36727.

It is an arithmetic number, because the mean of its divisors is an integer number (155873655).

Almost surely, 2^623434477 is an apocalyptic number.

It is an amenable number.

623434477 is a deficient number, since it is larger than the sum of its proper divisors (60143).

623434477 is a wasteful number, since it uses less digits than its factorization.

623434477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60142.

The product of its digits is 338688, while the sum is 40.

The square root of 623434477 is about 24968.6699085073. The cubic root of 623434477 is about 854.2735080198.

The spelling of 623434477 in words is "six hundred twenty-three million, four hundred thirty-four thousand, four hundred seventy-seven".