55539929 has 2 divisors, whose sum is σ = 55539930. Its totient is φ = 55539928.

The previous prime is 55539889. The next prime is 55539943. The reversal of 55539929 is 92993555.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45630025 + 9909904 = 6755^2 + 3148^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55539929 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55539229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27769964 + 27769965.

It is an arithmetic number, because the mean of its divisors is an integer number (27769965).

Almost surely, 2^55539929 is an apocalyptic number.

It is an amenable number.

55539929 is a deficient number, since it is larger than the sum of its proper divisors (1).

55539929 is an equidigital number, since it uses as much as digits as its factorization.

55539929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 546750, while the sum is 47.

The square root of 55539929 is about 7452.5115900614. The cubic root of 55539929 is about 381.5356349482.

The spelling of 55539929 in words is "fifty-five million, five hundred thirty-nine thousand, nine hundred twenty-nine".