56670739 has 4 divisors (see below), whose sum is σ = 57631320. Its totient is φ = 55710160.

The previous prime is 56670721. The next prime is 56670773. The reversal of 56670739 is 93707665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93707665 = 5 ⋅18741533.

It is not a de Polignac number, because 56670739 - 2⁹ = 56670227 is a prime.

It is a super-2 number, since 2×56670739² = 6423145317612242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56670695 and 56670704.

It is not an unprimeable number, because it can be changed into a prime (56670799) 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, 480202 + ... + 480319.

It is an arithmetic number, because the mean of its divisors is an integer number (14407830).

Almost surely, 2^56670739 is an apocalyptic number.

56670739 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

56670739 is a deficient number, since it is larger than the sum of its proper divisors (960581).

56670739 is an equidigital number, since it uses as much as digits as its factorization.

56670739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960580.

The product of its (nonzero) digits is 238140, while the sum is 43.

The square root of 56670739 is about 7527.9970111577. The cubic root of 56670739 is about 384.1076516574.

The spelling of 56670739 in words is "fifty-six million, six hundred seventy thousand, seven hundred thirty-nine".