49397657 has 2 divisors, whose sum is σ = 49397658. Its totient is φ = 49397656.

The previous prime is 49397653. The next prime is 49397671. The reversal of 49397657 is 75679394.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48594841 + 802816 = 6971^2 + 896^2 .

It is a cyclic number.

It is not a de Polignac number, because 49397657 - 2² = 49397653 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (49397653) 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, 24698828 + 24698829.

It is an arithmetic number, because the mean of its divisors is an integer number (24698829).

Almost surely, 2^49397657 is an apocalyptic number.

It is an amenable number.

49397657 is a deficient number, since it is larger than the sum of its proper divisors (1).

49397657 is an equidigital number, since it uses as much as digits as its factorization.

49397657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1428840, while the sum is 50.

The square root of 49397657 is about 7028.3466761394. The cubic root of 49397657 is about 366.9178021508.

The spelling of 49397657 in words is "forty-nine million, three hundred ninety-seven thousand, six hundred fifty-seven".