49995981 has 16 divisors (see below), whose sum is σ = 84649600. Its totient is φ = 28569024.

The previous prime is 49995943. The next prime is 49996033. The reversal of 49995981 is 18959994.

49995981 is a `hidden beast` number, since 49 + 9 + 9 + 598 + 1 = 666.

It is not a de Polignac number, because 49995981 - 2⁷ = 49995853 is a prime.

It is a super-2 number, since 2×49995981² = 4999196232304722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49995941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132076 + ... + 132453.

It is an arithmetic number, because the mean of its divisors is an integer number (5290600).

Almost surely, 2^49995981 is an apocalyptic number.

It is an amenable number.

49995981 is a deficient number, since it is larger than the sum of its proper divisors (34653619).

49995981 is a wasteful number, since it uses less digits than its factorization.

49995981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264545 (or 264539 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 54.

The square root of 49995981 is about 7070.7836199392. The cubic root of 49995981 is about 368.3932788512.

The spelling of 49995981 in words is "forty-nine million, nine hundred ninety-five thousand, nine hundred eighty-one".