55972099 has 2 divisors, whose sum is σ = 55972100. Its totient is φ = 55972098.

The previous prime is 55972097. The next prime is 55972121. The reversal of 55972099 is 99027955.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55972099 - 2¹ = 55972097 is a prime.

Together with 55972097, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55972097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27986049 + 27986050.

It is an arithmetic number, because the mean of its divisors is an integer number (27986050).

Almost surely, 2^55972099 is an apocalyptic number.

55972099 is a deficient number, since it is larger than the sum of its proper divisors (1).

55972099 is an equidigital number, since it uses as much as digits as its factorization.

55972099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 255150, while the sum is 46.

The square root of 55972099 is about 7481.4503273095. The cubic root of 55972099 is about 382.5226870790.

The spelling of 55972099 in words is "fifty-five million, nine hundred seventy-two thousand, ninety-nine".