75857109 has 8 divisors (see below), whose sum is σ = 101204160. Its totient is φ = 50540736.

The previous prime is 75857083. The next prime is 75857113. The reversal of 75857109 is 90175857.

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

It is not a de Polignac number, because 75857109 - 2¹⁵ = 75824341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75857129) 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, 1092 + ... + 12365.

It is an arithmetic number, because the mean of its divisors is an integer number (12650520).

Almost surely, 2^75857109 is an apocalyptic number.

It is an amenable number.

75857109 is a deficient number, since it is larger than the sum of its proper divisors (25347051).

75857109 is a wasteful number, since it uses less digits than its factorization.

75857109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15339.

The product of its (nonzero) digits is 88200, while the sum is 42.

The square root of 75857109 is about 8709.5986704325. The cubic root of 75857109 is about 423.3167264998.

The spelling of 75857109 in words is "seventy-five million, eight hundred fifty-seven thousand, one hundred nine".