75438659 has 4 divisors (see below), whose sum is σ = 75565200. Its totient is φ = 75312120.

The previous prime is 75438653. The next prime is 75438661. The reversal of 75438659 is 95683457.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95683457 = 79 ⋅1211183.

It is a cyclic number.

It is not a de Polignac number, because 75438659 - 2²⁰ = 74390083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75438653) 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, 62372 + ... + 63569.

It is an arithmetic number, because the mean of its divisors is an integer number (18891300).

Almost surely, 2^75438659 is an apocalyptic number.

75438659 is a deficient number, since it is larger than the sum of its proper divisors (126541).

75438659 is a wasteful number, since it uses less digits than its factorization.

75438659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126540.

The product of its digits is 907200, while the sum is 47.

The square root of 75438659 is about 8685.5431033413. The cubic root of 75438659 is about 422.5369112156.

The spelling of 75438659 in words is "seventy-five million, four hundred thirty-eight thousand, six hundred fifty-nine".