623977793 has 4 divisors (see below), whose sum is σ = 632525508. Its totient is φ = 615430080.

The previous prime is 623977789. The next prime is 623977801. The reversal of 623977793 is 397779326.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 487835569 + 136142224 = 22087^2 + 11668^2 .

It is a cyclic number.

It is not a de Polignac number, because 623977793 - 2² = 623977789 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (623977763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4273748 + ... + 4273893.

It is an arithmetic number, because the mean of its divisors is an integer number (158131377).

Almost surely, 2^623977793 is an apocalyptic number.

It is an amenable number.

623977793 is a deficient number, since it is larger than the sum of its proper divisors (8547715).

623977793 is an equidigital number, since it uses as much as digits as its factorization.

623977793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8547714.

The product of its digits is 3000564, while the sum is 53.

The square root of 623977793 is about 24979.5474938999. The cubic root of 623977793 is about 854.5215991540.

The spelling of 623977793 in words is "six hundred twenty-three million, nine hundred seventy-seven thousand, seven hundred ninety-three".