75497391 has 12 divisors (see below), whose sum is σ = 115466832. Its totient is φ = 47370816.

The previous prime is 75497363. The next prime is 75497413. The reversal of 75497391 is 19379457.

75497391 is a `hidden beast` number, since 75 + 497 + 3 + 91 = 666.

It is not a de Polignac number, because 75497391 - 2⁶ = 75497327 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75497311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 246571 + ... + 246876.

It is an arithmetic number, because the mean of its divisors is an integer number (9622236).

Almost surely, 2^75497391 is an apocalyptic number.

75497391 is a deficient number, since it is larger than the sum of its proper divisors (39969441).

75497391 is a wasteful number, since it uses less digits than its factorization.

75497391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493470 (or 493467 counting only the distinct ones).

The product of its digits is 238140, while the sum is 45.

The square root of 75497391 is about 8688.9234661148. The cubic root of 75497391 is about 422.6465367082.

The spelling of 75497391 in words is "seventy-five million, four hundred ninety-seven thousand, three hundred ninety-one".