87511273 has 4 divisors (see below), whose sum is σ = 87550848. Its totient is φ = 87471700.

The previous prime is 87511247. The next prime is 87511289. The reversal of 87511273 is 37211578.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87511273 - 2¹⁷ = 87380201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87511213) 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, 16261 + ... + 20962.

It is an arithmetic number, because the mean of its divisors is an integer number (21887712).

Almost surely, 2^87511273 is an apocalyptic number.

It is an amenable number.

87511273 is a deficient number, since it is larger than the sum of its proper divisors (39575).

87511273 is a wasteful number, since it uses less digits than its factorization.

87511273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39574.

The product of its digits is 11760, while the sum is 34.

The square root of 87511273 is about 9354.7460147243. The cubic root of 87511273 is about 443.9710654656.

The spelling of 87511273 in words is "eighty-seven million, five hundred eleven thousand, two hundred seventy-three".