623213477 has 4 divisors (see below), whose sum is σ = 624701280. Its totient is φ = 621725676.

The previous prime is 623213473. The next prime is 623213573. The reversal of 623213477 is 774312326.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 774312326 = 2 ⋅387156163.

It is a cyclic number.

It is not a de Polignac number, because 623213477 - 2² = 623213473 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623213473) 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, 743273 + ... + 744110.

It is an arithmetic number, because the mean of its divisors is an integer number (156175320).

Almost surely, 2^623213477 is an apocalyptic number.

It is an amenable number.

623213477 is a deficient number, since it is larger than the sum of its proper divisors (1487803).

623213477 is a wasteful number, since it uses less digits than its factorization.

623213477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487802.

The product of its digits is 42336, while the sum is 35.

The square root of 623213477 is about 24964.2439701266. The cubic root of 623213477 is about 854.1725528727.

The spelling of 623213477 in words is "six hundred twenty-three million, two hundred thirteen thousand, four hundred seventy-seven".