75639091 has 8 divisors (see below), whose sum is σ = 82580400. Its totient is φ = 68708640.

The previous prime is 75639089. The next prime is 75639097. The reversal of 75639091 is 19093657.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 75639091 - 2¹ = 75639089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75639097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20625 + ... + 24013.

It is an arithmetic number, because the mean of its divisors is an integer number (10322550).

Almost surely, 2^75639091 is an apocalyptic number.

75639091 is a deficient number, since it is larger than the sum of its proper divisors (6941309).

75639091 is a wasteful number, since it uses less digits than its factorization.

75639091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5429.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 75639091 is about 8697.0737032636. The cubic root of 75639091 is about 422.9107912482.

The spelling of 75639091 in words is "seventy-five million, six hundred thirty-nine thousand, ninety-one".