75997491 has 4 divisors (see below), whose sum is σ = 101329992. Its totient is φ = 50664992.

The previous prime is 75997489. The next prime is 75997547. The reversal of 75997491 is 19479957.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 75997491 - 2¹ = 75997489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75997091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12666246 + ... + 12666251.

It is an arithmetic number, because the mean of its divisors is an integer number (25332498).

Almost surely, 2^75997491 is an apocalyptic number.

75997491 is a deficient number, since it is larger than the sum of its proper divisors (25332501).

75997491 is a wasteful number, since it uses less digits than its factorization.

75997491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25332500.

The product of its digits is 714420, while the sum is 51.

The square root of 75997491 is about 8717.6539848746. The cubic root of 75997491 is about 423.5776971104.

The spelling of 75997491 in words is "seventy-five million, nine hundred ninety-seven thousand, four hundred ninety-one".