61631793 has 16 divisors (see below), whose sum is σ = 91512000. Its totient is φ = 40995360.

The previous prime is 61631747. The next prime is 61631819. The reversal of 61631793 is 39713616.

61631793 is a `hidden beast` number, since 616 + 31 + 7 + 9 + 3 = 666.

It is not a de Polignac number, because 61631793 - 2¹⁷ = 61500721 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61631723) 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, 10933 + ... + 15581.

It is an arithmetic number, because the mean of its divisors is an integer number (5719500).

Almost surely, 2^61631793 is an apocalyptic number.

It is an amenable number.

61631793 is a deficient number, since it is larger than the sum of its proper divisors (29880207).

61631793 is a wasteful number, since it uses less digits than its factorization.

61631793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5149 (or 5143 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 61631793 is about 7850.5918885139. The cubic root of 61631793 is about 395.0040975914.

The spelling of 61631793 in words is "sixty-one million, six hundred thirty-one thousand, seven hundred ninety-three".