75017139 has 4 divisors (see below), whose sum is σ = 100022856. Its totient is φ = 50011424.

The previous prime is 75017119. The next prime is 75017203. The reversal of 75017139 is 93171057.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 75017139 - 2⁷ = 75017011 is a prime.

It is a super-2 number, since 2×75017139² = 11255142287490642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (75017119) 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, 12502854 + ... + 12502859.

It is an arithmetic number, because the mean of its divisors is an integer number (25005714).

Almost surely, 2^75017139 is an apocalyptic number.

75017139 is a deficient number, since it is larger than the sum of its proper divisors (25005717).

75017139 is a wasteful number, since it uses less digits than its factorization.

75017139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25005716.

The product of its (nonzero) digits is 6615, while the sum is 33.

The square root of 75017139 is about 8661.2435019459. The cubic root of 75017139 is about 421.7484537430.

The spelling of 75017139 in words is "seventy-five million, seventeen thousand, one hundred thirty-nine".