75731961 has 16 divisors (see below), whose sum is σ = 104065920. Its totient is φ = 48958080.

The previous prime is 75731959. The next prime is 75732011. The reversal of 75731961 is 16913757.

It is not a de Polignac number, because 75731961 - 2¹ = 75731959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75731941) 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, 19500 + ... + 23058.

It is an arithmetic number, because the mean of its divisors is an integer number (6504120).

Almost surely, 2^75731961 is an apocalyptic number.

It is an amenable number.

75731961 is a deficient number, since it is larger than the sum of its proper divisors (28333959).

75731961 is a wasteful number, since it uses less digits than its factorization.

75731961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3776.

The product of its digits is 39690, while the sum is 39.

The square root of 75731961 is about 8702.4112175879. The cubic root of 75731961 is about 423.0838043526.

The spelling of 75731961 in words is "seventy-five million, seven hundred thirty-one thousand, nine hundred sixty-one".