49515997 has 2 divisors, whose sum is σ = 49515998. Its totient is φ = 49515996.

The previous prime is 49515967. The next prime is 49516009. The reversal of 49515997 is 79951594.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49364676 + 151321 = 7026^2 + 389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49515997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 49515997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49515937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24757998 + 24757999.

It is an arithmetic number, because the mean of its divisors is an integer number (24757999).

Almost surely, 2^49515997 is an apocalyptic number.

It is an amenable number.

49515997 is a deficient number, since it is larger than the sum of its proper divisors (1).

49515997 is an equidigital number, since it uses as much as digits as its factorization.

49515997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 510300, while the sum is 49.

The square root of 49515997 is about 7036.7604051865. The cubic root of 49515997 is about 367.2105719391.

The spelling of 49515997 in words is "forty-nine million, five hundred fifteen thousand, nine hundred ninety-seven".