75399725 has 12 divisors (see below), whose sum is σ = 94074336. Its totient is φ = 59946480.

The previous prime is 75399691. The next prime is 75399763. The reversal of 75399725 is 52799357.

It is not a de Polignac number, because 75399725 - 2¹⁸ = 75137581 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 75399725.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 5177 + ... + 13326.

It is an arithmetic number, because the mean of its divisors is an integer number (7839528).

Almost surely, 2^75399725 is an apocalyptic number.

It is an amenable number.

75399725 is a deficient number, since it is larger than the sum of its proper divisors (18674611).

75399725 is a wasteful number, since it uses less digits than its factorization.

75399725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18676 (or 18671 counting only the distinct ones).

The product of its digits is 595350, while the sum is 47.

The square root of 75399725 is about 8683.3015034605. The cubic root of 75399725 is about 422.4642080717.

The spelling of 75399725 in words is "seventy-five million, three hundred ninety-nine thousand, seven hundred twenty-five".