87513437 has 4 divisors (see below), whose sum is σ = 95469216. Its totient is φ = 79557660.

The previous prime is 87513431. The next prime is 87513443. The reversal of 87513437 is 73431578.

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 an interprime number because it is at equal distance from previous prime (87513431) and next prime (87513443).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87513437 is a prime.

It is a super-3 number, since 3×87513437³ (a number of 25 digits) contains 333 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 87513437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87513431) 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, 3977873 + ... + 3977894.

It is an arithmetic number, because the mean of its divisors is an integer number (23867304).

Almost surely, 2^87513437 is an apocalyptic number.

It is an amenable number.

87513437 is a deficient number, since it is larger than the sum of its proper divisors (7955779).

87513437 is a wasteful number, since it uses less digits than its factorization.

87513437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7955778.

The product of its digits is 70560, while the sum is 38.

The square root of 87513437 is about 9354.8616772243. The cubic root of 87513437 is about 443.9747249768.

The spelling of 87513437 in words is "eighty-seven million, five hundred thirteen thousand, four hundred thirty-seven".