56723019 has 4 divisors (see below), whose sum is σ = 75630696. Its totient is φ = 37815344.

The previous prime is 56723003. The next prime is 56723021. The reversal of 56723019 is 91032765.

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

It is a cyclic number.

It is not a de Polignac number, because 56723019 - 2⁴ = 56723003 is a prime.

It is a super-2 number, since 2×56723019² = 6435001768948722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56723039) 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, 9453834 + ... + 9453839.

It is an arithmetic number, because the mean of its divisors is an integer number (18907674).

Almost surely, 2^56723019 is an apocalyptic number.

56723019 is a deficient number, since it is larger than the sum of its proper divisors (18907677).

56723019 is a wasteful number, since it uses less digits than its factorization.

56723019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18907676.

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 56723019 is about 7531.4685818903. The cubic root of 56723019 is about 384.2257312663.

The spelling of 56723019 in words is "fifty-six million, seven hundred twenty-three thousand, nineteen".