87249173 has 8 divisors (see below), whose sum is σ = 95766816. Its totient is φ = 78829200.

The previous prime is 87249167. The next prime is 87249233. The reversal of 87249173 is 37194278.

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

It is a cyclic number.

It is not a de Polignac number, because 87249173 - 2⁴ = 87249157 is a prime.

It is a super-2 number, since 2×87249173² = 15224836378367858, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 87249173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87249163) 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, 22538 + ... + 26123.

It is an arithmetic number, because the mean of its divisors is an integer number (11970852).

Almost surely, 2^87249173 is an apocalyptic number.

It is an amenable number.

87249173 is a deficient number, since it is larger than the sum of its proper divisors (8517643).

87249173 is a wasteful number, since it uses less digits than its factorization.

87249173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48835.

The product of its digits is 84672, while the sum is 41.

The square root of 87249173 is about 9340.7265777347. The cubic root of 87249173 is about 443.5273847888.

The spelling of 87249173 in words is "eighty-seven million, two hundred forty-nine thousand, one hundred seventy-three".