75387399 has 16 divisors (see below), whose sum is σ = 106612224. Its totient is φ = 47282400.

The previous prime is 75387371. The next prime is 75387407. The reversal of 75387399 is 99378357.

It is a happy number.

It is not a de Polignac number, because 75387399 - 2⁹ = 75386887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75387349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4747 + ... + 13164.

It is an arithmetic number, because the mean of its divisors is an integer number (6663264).

Almost surely, 2^75387399 is an apocalyptic number.

75387399 is a deficient number, since it is larger than the sum of its proper divisors (31224825).

75387399 is a wasteful number, since it uses less digits than its factorization.

75387399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17998.

The product of its digits is 1428840, while the sum is 51.

The square root of 75387399 is about 8682.5917213698. The cubic root of 75387399 is about 422.4411859824.

The spelling of 75387399 in words is "seventy-five million, three hundred eighty-seven thousand, three hundred ninety-nine".