55996649 has 2 divisors, whose sum is σ = 55996650. Its totient is φ = 55996648.

The previous prime is 55996643. The next prime is 55996687. The reversal of 55996649 is 94669955.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55771024 + 225625 = 7468^2 + 475^2 .

It is a cyclic number.

It is not a de Polignac number, because 55996649 - 2⁸ = 55996393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55996649.

It is not a weakly prime, because it can be changed into another prime (55996643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27998324 + 27998325.

It is an arithmetic number, because the mean of its divisors is an integer number (27998325).

Almost surely, 2^55996649 is an apocalyptic number.

It is an amenable number.

55996649 is a deficient number, since it is larger than the sum of its proper divisors (1).

55996649 is an equidigital number, since it uses as much as digits as its factorization.

55996649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2624400, while the sum is 53.

The square root of 55996649 is about 7483.0908720929. The cubic root of 55996649 is about 382.5786051732.

The spelling of 55996649 in words is "fifty-five million, nine hundred ninety-six thousand, six hundred forty-nine".