55400099 has 2 divisors, whose sum is σ = 55400100. Its totient is φ = 55400098.

The previous prime is 55400083. The next prime is 55400117. The reversal of 55400099 is 99000455.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55400099 - 2⁴ = 55400083 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55400699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27700049 + 27700050.

It is an arithmetic number, because the mean of its divisors is an integer number (27700050).

Almost surely, 2^55400099 is an apocalyptic number.

55400099 is a deficient number, since it is larger than the sum of its proper divisors (1).

55400099 is an equidigital number, since it uses as much as digits as its factorization.

55400099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 55400099 is about 7443.1242768074. The cubic root of 55400099 is about 381.2151750328.

The spelling of 55400099 in words is "fifty-five million, four hundred thousand, ninety-nine".