61873931 has 16 divisors (see below), whose sum is σ = 75101184. Its totient is φ = 49762944.

The previous prime is 61873921. The next prime is 61873943. The reversal of 61873931 is 13937816.

61873931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-61873931 is a prime.

It is a super-2 number, since 2×61873931² = 7656766674785522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61873921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54536 + ... + 55658.

It is an arithmetic number, because the mean of its divisors is an integer number (4693824).

Almost surely, 2^61873931 is an apocalyptic number.

61873931 is a deficient number, since it is larger than the sum of its proper divisors (13227253).

61873931 is a wasteful number, since it uses less digits than its factorization.

61873931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1610.

The product of its digits is 27216, while the sum is 38.

The square root of 61873931 is about 7865.9984108821. The cubic root of 61873931 is about 395.5207168738.

The spelling of 61873931 in words is "sixty-one million, eight hundred seventy-three thousand, nine hundred thirty-one".