75978413 has 4 divisors (see below), whose sum is σ = 86832480. Its totient is φ = 65124348.

The previous prime is 75978403. The next prime is 75978431. The reversal of 75978413 is 31487957.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 75978413 - 2¹⁰ = 75977389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75978403) 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, 5427023 + ... + 5427036.

It is an arithmetic number, because the mean of its divisors is an integer number (21708120).

Almost surely, 2^75978413 is an apocalyptic number.

It is an amenable number.

75978413 is a deficient number, since it is larger than the sum of its proper divisors (10854067).

75978413 is a wasteful number, since it uses less digits than its factorization.

75978413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10854066.

The product of its digits is 211680, while the sum is 44.

The square root of 75978413 is about 8716.5596997898. The cubic root of 75978413 is about 423.5422499244.

The spelling of 75978413 in words is "seventy-five million, nine hundred seventy-eight thousand, four hundred thirteen".