87151291 has 4 divisors (see below), whose sum is σ = 87173800. Its totient is φ = 87128784.

The previous prime is 87151279. The next prime is 87151321. The reversal of 87151291 is 19215178.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87151291 - 2¹¹ = 87149243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87151241) 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, 3801 + ... + 13738.

It is an arithmetic number, because the mean of its divisors is an integer number (21793450).

Almost surely, 2^87151291 is an apocalyptic number.

87151291 is a deficient number, since it is larger than the sum of its proper divisors (22509).

87151291 is a wasteful number, since it uses less digits than its factorization.

87151291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22508.

The product of its digits is 5040, while the sum is 34.

The square root of 87151291 is about 9335.4855792294. The cubic root of 87151291 is about 443.3614630928.

The spelling of 87151291 in words is "eighty-seven million, one hundred fifty-one thousand, two hundred ninety-one".