55974397 has 2 divisors, whose sum is σ = 55974398. Its totient is φ = 55974396.

The previous prime is 55974349. The next prime is 55974407. The reversal of 55974397 is 79347955.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45077796 + 10896601 = 6714^2 + 3301^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55974397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55974397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55974337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27987198 + 27987199.

It is an arithmetic number, because the mean of its divisors is an integer number (27987199).

Almost surely, 2^55974397 is an apocalyptic number.

It is an amenable number.

55974397 is a deficient number, since it is larger than the sum of its proper divisors (1).

55974397 is an equidigital number, since it uses as much as digits as its factorization.

55974397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1190700, while the sum is 49.

The square root of 55974397 is about 7481.6039055807. The cubic root of 55974397 is about 382.5279219795.

The spelling of 55974397 in words is "fifty-five million, nine hundred seventy-four thousand, three hundred ninety-seven".