75139369 has 6 divisors (see below), whose sum is σ = 75703290. Its totient is φ = 74579616.

The previous prime is 75139343. The next prime is 75139399. The reversal of 75139369 is 96393157.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 69555600 + 5583769 = 8340^2 + 2363^2 .

It is a de Polignac number, because none of the positive numbers 2^k-75139369 is a prime.

It is a super-2 number, since 2×75139369² = 11291849547436322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75139399) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17377 + ... + 21265.

It is an arithmetic number, because the mean of its divisors is an integer number (12617215).

Almost surely, 2^75139369 is an apocalyptic number.

It is an amenable number.

75139369 is a deficient number, since it is larger than the sum of its proper divisors (563921).

75139369 is an equidigital number, since it uses as much as digits as its factorization.

75139369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4167 (or 4028 counting only the distinct ones).

The product of its digits is 153090, while the sum is 43.

The square root of 75139369 is about 8668.2967761839. The cubic root of 75139369 is about 421.9773896079.

The spelling of 75139369 in words is "seventy-five million, one hundred thirty-nine thousand, three hundred sixty-nine".