55975961 has 2 divisors, whose sum is σ = 55975962. Its totient is φ = 55975960.

The previous prime is 55975949. The next prime is 55975967. The reversal of 55975961 is 16957955.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48385936 + 7590025 = 6956^2 + 2755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55975961 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (55975967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27987980 + 27987981.

It is an arithmetic number, because the mean of its divisors is an integer number (27987981).

Almost surely, 2^55975961 is an apocalyptic number.

It is an amenable number.

55975961 is a deficient number, since it is larger than the sum of its proper divisors (1).

55975961 is an equidigital number, since it uses as much as digits as its factorization.

55975961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 425250, while the sum is 47.

The square root of 55975961 is about 7481.7084278927. The cubic root of 55975961 is about 382.5314847280.

The spelling of 55975961 in words is "fifty-five million, nine hundred seventy-five thousand, nine hundred sixty-one".