75963721 has 8 divisors (see below), whose sum is σ = 76697984. Its totient is φ = 75232800.

The previous prime is 75963697. The next prime is 75963737. The reversal of 75963721 is 12736957.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 75963721 - 2¹⁷ = 75832649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75963761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73021 + ... + 74053.

It is an arithmetic number, because the mean of its divisors is an integer number (9587248).

Almost surely, 2^75963721 is an apocalyptic number.

It is an amenable number.

75963721 is a deficient number, since it is larger than the sum of its proper divisors (734263).

75963721 is a wasteful number, since it uses less digits than its factorization.

75963721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1671.

The product of its digits is 79380, while the sum is 40.

The square root of 75963721 is about 8715.7168953563. The cubic root of 75963721 is about 423.5149479420.

The spelling of 75963721 in words is "seventy-five million, nine hundred sixty-three thousand, seven hundred twenty-one".