49955557 has 2 divisors, whose sum is σ = 49955558. Its totient is φ = 49955556.

The previous prime is 49955533. The next prime is 49955569. The reversal of 49955557 is 75555994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28740321 + 21215236 = 5361^2 + 4606^2 .

It is a cyclic number.

It is not a de Polignac number, because 49955557 - 2²³ = 41566949 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 49955557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49955357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24977778 + 24977779.

It is an arithmetic number, because the mean of its divisors is an integer number (24977779).

Almost surely, 2^49955557 is an apocalyptic number.

It is an amenable number.

49955557 is a deficient number, since it is larger than the sum of its proper divisors (1).

49955557 is an equidigital number, since it uses as much as digits as its factorization.

49955557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1417500, while the sum is 49.

The square root of 49955557 is about 7067.9245185556. The cubic root of 49955557 is about 368.2939645662.

The spelling of 49955557 in words is "forty-nine million, nine hundred fifty-five thousand, five hundred fifty-seven".