55313969 has 2 divisors, whose sum is σ = 55313970. Its totient is φ = 55313968.

The previous prime is 55313957. The next prime is 55313977. The reversal of 55313969 is 96931355.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47541025 + 7772944 = 6895^2 + 2788^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55313969 is a prime.

It is a super-2 number, since 2×55313969² = 6119270333065922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (55313989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27656984 + 27656985.

It is an arithmetic number, because the mean of its divisors is an integer number (27656985).

Almost surely, 2^55313969 is an apocalyptic number.

It is an amenable number.

55313969 is a deficient number, since it is larger than the sum of its proper divisors (1).

55313969 is an equidigital number, since it uses as much as digits as its factorization.

55313969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 109350, while the sum is 41.

The square root of 55313969 is about 7437.3361494557. The cubic root of 55313969 is about 381.0175153779.

The spelling of 55313969 in words is "fifty-five million, three hundred thirteen thousand, nine hundred sixty-nine".