87257279 has 4 divisors (see below), whose sum is σ = 87294984. Its totient is φ = 87219576.

The previous prime is 87257263. The next prime is 87257297. The reversal of 87257279 is 97275278.

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 87257279 - 2⁴ = 87257263 is a prime.

It is a super-2 number, since 2×87257279² = 15227665476967682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87257299) 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, 15137 + ... + 20090.

It is an arithmetic number, because the mean of its divisors is an integer number (21823746).

Almost surely, 2^87257279 is an apocalyptic number.

87257279 is a deficient number, since it is larger than the sum of its proper divisors (37705).

87257279 is a wasteful number, since it uses less digits than its factorization.

87257279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37704.

The product of its digits is 493920, while the sum is 47.

The square root of 87257279 is about 9341.1604739454. The cubic root of 87257279 is about 443.5411198632.

The spelling of 87257279 in words is "eighty-seven million, two hundred fifty-seven thousand, two hundred seventy-nine".