55974649 has 2 divisors, whose sum is σ = 55974650. Its totient is φ = 55974648.

The previous prime is 55974647. The next prime is 55974671. The reversal of 55974649 is 94647955.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54834025 + 1140624 = 7405^2 + 1068^2 .

It is a cyclic number.

It is not a de Polignac number, because 55974649 - 2¹ = 55974647 is a prime.

It is a super-2 number, since 2×55974649² = 6266322661346402, which contains 22 as substring.

Together with 55974647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55974641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27987324 + 27987325.

It is an arithmetic number, because the mean of its divisors is an integer number (27987325).

Almost surely, 2^55974649 is an apocalyptic number.

It is an amenable number.

55974649 is a deficient number, since it is larger than the sum of its proper divisors (1).

55974649 is an equidigital number, since it uses as much as digits as its factorization.

55974649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1360800, while the sum is 49.

The square root of 55974649 is about 7481.6207468703. The cubic root of 55974649 is about 382.5284960330.

The spelling of 55974649 in words is "fifty-five million, nine hundred seventy-four thousand, six hundred forty-nine".