55954391 has 2 divisors, whose sum is σ = 55954392. Its totient is φ = 55954390.

The previous prime is 55954363. The next prime is 55954399. The reversal of 55954391 is 19345955.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55954391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55954399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27977195 + 27977196.

It is an arithmetic number, because the mean of its divisors is an integer number (27977196).

Almost surely, 2^55954391 is an apocalyptic number.

55954391 is a deficient number, since it is larger than the sum of its proper divisors (1).

55954391 is an equidigital number, since it uses as much as digits as its factorization.

55954391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 121500, while the sum is 41.

The square root of 55954391 is about 7480.2667733176. The cubic root of 55954391 is about 382.4823430128.

The spelling of 55954391 in words is "fifty-five million, nine hundred fifty-four thousand, three hundred ninety-one".