55900997 has 2 divisors, whose sum is σ = 55900998. Its totient is φ = 55900996.

The previous prime is 55900937. The next prime is 55901011. The reversal of 55900997 is 79900955.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39262756 + 16638241 = 6266^2 + 4079^2 .

It is a cyclic number.

It is not a de Polignac number, because 55900997 - 2¹⁸ = 55638853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55900937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27950498 + 27950499.

It is an arithmetic number, because the mean of its divisors is an integer number (27950499).

Almost surely, 2^55900997 is an apocalyptic number.

It is an amenable number.

55900997 is a deficient number, since it is larger than the sum of its proper divisors (1).

55900997 is an equidigital number, since it uses as much as digits as its factorization.

55900997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127575, while the sum is 44.

The square root of 55900997 is about 7476.6969311321. The cubic root of 55900997 is about 382.3606441242.

The spelling of 55900997 in words is "fifty-five million, nine hundred thousand, nine hundred ninety-seven".