87503731 has 8 divisors (see below), whose sum is σ = 103230464. Its totient is φ = 72583560.

The previous prime is 87503719. The next prime is 87503749. The reversal of 87503731 is 13730578.

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

It is not a de Polignac number, because 87503731 - 2¹³ = 87495539 is a prime.

It is a super-2 number, since 2×87503731² = 15313805877840722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87503771) 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, 201405 + ... + 201838.

It is an arithmetic number, because the mean of its divisors is an integer number (12903808).

Almost surely, 2^87503731 is an apocalyptic number.

87503731 is a deficient number, since it is larger than the sum of its proper divisors (15726733).

87503731 is a wasteful number, since it uses less digits than its factorization.

87503731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403281.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 87503731 is about 9354.3428951477. The cubic root of 87503731 is about 443.9583108194.

The spelling of 87503731 in words is "eighty-seven million, five hundred three thousand, seven hundred thirty-one".