723975857 has 4 divisors (see below), whose sum is σ = 789791856. Its totient is φ = 658159860.

The previous prime is 723975841. The next prime is 723975859. The reversal of 723975857 is 758579327.

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 a cyclic number.

It is not a de Polignac number, because 723975857 - 2⁴ = 723975841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 723975799 and 723975808.

It is not an unprimeable number, because it can be changed into a prime (723975859) 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, 32907983 + ... + 32908004.

It is an arithmetic number, because the mean of its divisors is an integer number (197447964).

Almost surely, 2^723975857 is an apocalyptic number.

It is an amenable number.

723975857 is a deficient number, since it is larger than the sum of its proper divisors (65815999).

723975857 is a wasteful number, since it uses less digits than its factorization.

723975857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65815998.

The product of its digits is 3704400, while the sum is 53.

The square root of 723975857 is about 26906.7994566429. The cubic root of 723975857 is about 897.9276834406.

The spelling of 723975857 in words is "seven hundred twenty-three million, nine hundred seventy-five thousand, eight hundred fifty-seven".