87969291 has 8 divisors (see below), whose sum is σ = 118610640. Its totient is φ = 57987072.

The previous prime is 87969281. The next prime is 87969337. The reversal of 87969291 is 19296978.

It is a happy number.

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

It is not a de Polignac number, because 87969291 - 2⁷ = 87969163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87969281) 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, 164470 + ... + 165003.

It is an arithmetic number, because the mean of its divisors is an integer number (14826330).

Almost surely, 2^87969291 is an apocalyptic number.

87969291 is a deficient number, since it is larger than the sum of its proper divisors (30641349).

87969291 is a wasteful number, since it uses less digits than its factorization.

87969291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329565.

The product of its digits is 489888, while the sum is 51.

The square root of 87969291 is about 9379.1945816259. The cubic root of 87969291 is about 444.7442725453.

The spelling of 87969291 in words is "eighty-seven million, nine hundred sixty-nine thousand, two hundred ninety-one".