61931404 has 6 divisors (see below), whose sum is σ = 108379964. Its totient is φ = 30965700.

The previous prime is 61931399. The next prime is 61931407. The reversal of 61931404 is 40413916.

It is a super-2 number, since 2×61931404² = 7670997602822432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61931407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7741422 + ... + 7741429.

Almost surely, 2^61931404 is an apocalyptic number.

It is an amenable number.

61931404 is a deficient number, since it is larger than the sum of its proper divisors (46448560).

61931404 is a wasteful number, since it uses less digits than its factorization.

61931404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15482855 (or 15482853 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 61931404 is about 7869.6508181748. The cubic root of 61931404 is about 395.6431417633.

It can be divided in two parts, 619 and 31404, that added together give a palindrome (32023).

The spelling of 61931404 in words is "sixty-one million, nine hundred thirty-one thousand, four hundred four".