87430731 has 8 divisors (see below), whose sum is σ = 116649360. Its totient is φ = 58249632.

The previous prime is 87430727. The next prime is 87430747. The reversal of 87430731 is 13703478.

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

It is not a de Polignac number, because 87430731 - 2² = 87430727 is a prime.

It is a super-2 number, since 2×87430731² = 15288265446388722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 87430692 and 87430701.

It is not an unprimeable number, because it can be changed into a prime (87430771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3400 + ... + 13653.

It is an arithmetic number, because the mean of its divisors is an integer number (14581170).

Almost surely, 2^87430731 is an apocalyptic number.

87430731 is a deficient number, since it is larger than the sum of its proper divisors (29218629).

87430731 is a wasteful number, since it uses less digits than its factorization.

87430731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18765.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 87430731 is about 9350.4401500678. The cubic root of 87430731 is about 443.8348190441.

The spelling of 87430731 in words is "eighty-seven million, four hundred thirty thousand, seven hundred thirty-one".