87297277 has 4 divisors (see below), whose sum is σ = 87339520. Its totient is φ = 87255036.

The previous prime is 87297257. The next prime is 87297289. The reversal of 87297277 is 77279278.

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 a de Polignac number, because none of the positive numbers 2^k-87297277 is a prime.

It is a super-2 number, since 2×87297277² = 15241629143229458, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87297277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87297247) 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, 17853 + ... + 22210.

It is an arithmetic number, because the mean of its divisors is an integer number (21834880).

Almost surely, 2^87297277 is an apocalyptic number.

It is an amenable number.

87297277 is a deficient number, since it is larger than the sum of its proper divisors (42243).

87297277 is a wasteful number, since it uses less digits than its factorization.

87297277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42242.

The product of its digits is 691488, while the sum is 49.

The square root of 87297277 is about 9343.3011832007. The cubic root of 87297277 is about 443.6088813454.

The spelling of 87297277 in words is "eighty-seven million, two hundred ninety-seven thousand, two hundred seventy-seven".