1623134477 has 4 divisors (see below), whose sum is σ = 1623227100. Its totient is φ = 1623041856.

The previous prime is 1623134453. The next prime is 1623134497. The reversal of 1623134477 is 7744313261.

It is a happy number.

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: 7744313261 = 16231 ⋅477131.

It can be written as a sum of positive squares in 2 ways, for example, as 1225770121 + 397364356 = 35011^2 + 19934^2 .

It is a cyclic number.

It is not a de Polignac number, because 1623134477 - 2¹⁴ = 1623118093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1623134477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1623134497) 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, 11102 + ... + 58047.

It is an arithmetic number, because the mean of its divisors is an integer number (405806775).

Almost surely, 2^1623134477 is an apocalyptic number.

It is an amenable number.

1623134477 is a deficient number, since it is larger than the sum of its proper divisors (92623).

1623134477 is an equidigital number, since it uses as much as digits as its factorization.

1623134477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92622.

The product of its digits is 84672, while the sum is 38.

The square root of 1623134477 is about 40288.1431316957. The cubic root of 1623134477 is about 1175.2172773385.

The spelling of 1623134477 in words is "one billion, six hundred twenty-three million, one hundred thirty-four thousand, four hundred seventy-seven".