55702391 has 2 divisors, whose sum is σ = 55702392. Its totient is φ = 55702390.

The previous prime is 55702351. The next prime is 55702399. The reversal of 55702391 is 19320755.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55702391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55702399) 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, 27851195 + 27851196.

It is an arithmetic number, because the mean of its divisors is an integer number (27851196).

Almost surely, 2^55702391 is an apocalyptic number.

55702391 is a deficient number, since it is larger than the sum of its proper divisors (1).

55702391 is an equidigital number, since it uses as much as digits as its factorization.

55702391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 55702391 is about 7463.4034461498. The cubic root of 55702391 is about 381.9072876983.

The spelling of 55702391 in words is "fifty-five million, seven hundred two thousand, three hundred ninety-one".