87191275 has 12 divisors (see below), whose sum is σ = 112818672. Its totient is φ = 66719840.

The previous prime is 87191267. The next prime is 87191287. The reversal of 87191275 is 57219178.

It is not a de Polignac number, because 87191275 - 2³ = 87191267 is a prime.

It is a super-2 number, since 2×87191275² = 15204636872251250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75244 + ... + 76393.

It is an arithmetic number, because the mean of its divisors is an integer number (9401556).

Almost surely, 2^87191275 is an apocalyptic number.

87191275 is a deficient number, since it is larger than the sum of its proper divisors (25627397).

87191275 is a wasteful number, since it uses less digits than its factorization.

87191275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151670 (or 151665 counting only the distinct ones).

The product of its digits is 35280, while the sum is 40.

The square root of 87191275 is about 9337.6268398346. The cubic root of 87191275 is about 443.4292557562.

The spelling of 87191275 in words is "eighty-seven million, one hundred ninety-one thousand, two hundred seventy-five".