55786013 has 2 divisors, whose sum is σ = 55786014. Its totient is φ = 55786012.

The previous prime is 55785991. The next prime is 55786021. The reversal of 55786013 is 31068755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47844889 + 7941124 = 6917^2 + 2818^2 .

It is a cyclic number.

It is not a de Polignac number, because 55786013 - 2¹⁶ = 55720477 is a prime.

It is a super-2 number, since 2×55786013² = 6224158492872338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55786613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27893006 + 27893007.

It is an arithmetic number, because the mean of its divisors is an integer number (27893007).

Almost surely, 2^55786013 is an apocalyptic number.

It is an amenable number.

55786013 is a deficient number, since it is larger than the sum of its proper divisors (1).

55786013 is an equidigital number, since it uses as much as digits as its factorization.

55786013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 55786013 is about 7469.0034810542. The cubic root of 55786013 is about 382.0983021411.

The spelling of 55786013 in words is "fifty-five million, seven hundred eighty-six thousand, thirteen".