55938791 has 2 divisors, whose sum is σ = 55938792. Its totient is φ = 55938790.

The previous prime is 55938761. The next prime is 55938803. The reversal of 55938791 is 19783955.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55938791 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55938761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27969395 + 27969396.

It is an arithmetic number, because the mean of its divisors is an integer number (27969396).

Almost surely, 2^55938791 is an apocalyptic number.

55938791 is a deficient number, since it is larger than the sum of its proper divisors (1).

55938791 is an equidigital number, since it uses as much as digits as its factorization.

55938791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 340200, while the sum is 47.

The square root of 55938791 is about 7479.2239570693. The cubic root of 55938791 is about 382.4467945418.

The spelling of 55938791 in words is "fifty-five million, nine hundred thirty-eight thousand, seven hundred ninety-one".