56426779 has 4 divisors (see below), whose sum is σ = 58372560. Its totient is φ = 54481000.

The previous prime is 56426761. The next prime is 56426863. The reversal of 56426779 is 97762465.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97762465 = 5 ⋅19552493.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56426779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56426719) 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, 972847 + ... + 972904.

It is an arithmetic number, because the mean of its divisors is an integer number (14593140).

Almost surely, 2^56426779 is an apocalyptic number.

56426779 is a deficient number, since it is larger than the sum of its proper divisors (1945781).

56426779 is a wasteful number, since it uses less digits than its factorization.

56426779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945780.

The product of its digits is 635040, while the sum is 46.

The square root of 56426779 is about 7511.7760216875. The cubic root of 56426779 is about 383.5556813806. Note that the first 3 decimals are identical.

It can be divided in two parts, 5642 and 6779, that added together give a palindrome (12421).

The spelling of 56426779 in words is "fifty-six million, four hundred twenty-six thousand, seven hundred seventy-nine".