87404291 has 8 divisors (see below), whose sum is σ = 94264800. Its totient is φ = 80563392.

The previous prime is 87404281. The next prime is 87404309. The reversal of 87404291 is 19240478.

87404291 = 1478² + 1479² + ... + 1516².

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

It is not a de Polignac number, because 87404291 - 2²⁶ = 20295427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87404281) 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, 5135 + ... + 14183.

It is an arithmetic number, because the mean of its divisors is an integer number (11783100).

Almost surely, 2^87404291 is an apocalyptic number.

87404291 is a deficient number, since it is larger than the sum of its proper divisors (6860509).

87404291 is a wasteful number, since it uses less digits than its factorization.

87404291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9805.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 87404291 is about 9349.0262059746. The cubic root of 87404291 is about 443.7900743812.

It can be divided in two parts, 8740 and 4291, that added together give a palindrome (13031).

The spelling of 87404291 in words is "eighty-seven million, four hundred four thousand, two hundred ninety-one".