49961985 has 16 divisors (see below), whose sum is σ = 81889920. Its totient is φ = 25996160.

The previous prime is 49961981. The next prime is 49962007. The reversal of 49961985 is 58916994.

It is not a de Polignac number, because 49961985 - 2² = 49961981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49961981) 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, 40005 + ... + 41234.

It is an arithmetic number, because the mean of its divisors is an integer number (5118120).

Almost surely, 2^49961985 is an apocalyptic number.

It is an amenable number.

49961985 is a deficient number, since it is larger than the sum of its proper divisors (31927935).

49961985 is a wasteful number, since it uses less digits than its factorization.

49961985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81288.

The product of its digits is 699840, while the sum is 51.

The square root of 49961985 is about 7068.3792343082. The cubic root of 49961985 is about 368.3097605538.

The spelling of 49961985 in words is "forty-nine million, nine hundred sixty-one thousand, nine hundred eighty-five".