56909011 has 2 divisors, whose sum is σ = 56909012. Its totient is φ = 56909010.

The previous prime is 56908949. The next prime is 56909029. The reversal of 56909011 is 11090965.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56909011 - 2⁷ = 56908883 is a prime.

It is equal to p_3389350 and since 56909011 and 3389350 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (56909051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28454505 + 28454506.

It is an arithmetic number, because the mean of its divisors is an integer number (28454506).

Almost surely, 2^56909011 is an apocalyptic number.

56909011 is a deficient number, since it is larger than the sum of its proper divisors (1).

56909011 is an equidigital number, since it uses as much as digits as its factorization.

56909011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 56909011 is about 7543.8061348367. The cubic root of 56909011 is about 384.6452255483.

Adding to 56909011 its reverse (11090965), we get a palindrome (67999976).

The spelling of 56909011 in words is "fifty-six million, nine hundred nine thousand, eleven".