623975997 has 4 divisors (see below), whose sum is σ = 831968000. Its totient is φ = 415983996.

The previous prime is 623975987. The next prime is 623976013. The reversal of 623975997 is 799579326.

623975997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is not a de Polignac number, because 623975997 - 2⁴ = 623975981 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 (623975927) 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, 103995997 + ... + 103996002.

It is an arithmetic number, because the mean of its divisors is an integer number (207992000).

Almost surely, 2^623975997 is an apocalyptic number.

It is an amenable number.

623975997 is a deficient number, since it is larger than the sum of its proper divisors (207992003).

623975997 is a wasteful number, since it uses less digits than its factorization.

623975997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207992002.

The product of its digits is 6429780, while the sum is 57.

The square root of 623975997 is about 24979.5115444638. The cubic root of 623975997 is about 854.5207792946.

The spelling of 623975997 in words is "six hundred twenty-three million, nine hundred seventy-five thousand, nine hundred ninety-seven".