49897531 has 2 divisors, whose sum is σ = 49897532. Its totient is φ = 49897530.

The previous prime is 49897517. The next prime is 49897541. The reversal of 49897531 is 13579894.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 49897531 - 2⁷ = 49897403 is a prime.

It is a super-2 number, since 2×49897531² = 4979527199791922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (49897541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24948765 + 24948766.

It is an arithmetic number, because the mean of its divisors is an integer number (24948766).

Almost surely, 2^49897531 is an apocalyptic number.

49897531 is a deficient number, since it is larger than the sum of its proper divisors (1).

49897531 is an equidigital number, since it uses as much as digits as its factorization.

49897531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 46.

The square root of 49897531 is about 7063.8184433067. The cubic root of 49897531 is about 368.1513117325.

The spelling of 49897531 in words is "forty-nine million, eight hundred ninety-seven thousand, five hundred thirty-one".