56780013 has 8 divisors (see below), whose sum is σ = 77135328. Its totient is φ = 37139024.

The previous prime is 56779997. The next prime is 56780027. The reversal of 56780013 is 31008765.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56780013 - 2⁴ = 56779997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56780063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178395 + ... + 178712.

It is an arithmetic number, because the mean of its divisors is an integer number (9641916).

Almost surely, 2^56780013 is an apocalyptic number.

56780013 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

It is an amenable number.

56780013 is a deficient number, since it is larger than the sum of its proper divisors (20355315).

56780013 is a wasteful number, since it uses less digits than its factorization.

56780013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357163.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 56780013 is about 7535.2513561261. The cubic root of 56780013 is about 384.3543752831.

Adding to 56780013 its reverse (31008765), we get a palindrome (87788778).

The spelling of 56780013 in words is "fifty-six million, seven hundred eighty thousand, thirteen".