87831489 has 8 divisors (see below), whose sum is σ = 118591360. Its totient is φ = 57812976.

The previous prime is 87831467. The next prime is 87831511. The reversal of 87831489 is 98413878.

It is an interprime number because it is at equal distance from previous prime (87831467) and next prime (87831511).

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

It is a de Polignac number, because none of the positive numbers 2^k-87831489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87838489) 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, 185062 + ... + 185535.

It is an arithmetic number, because the mean of its divisors is an integer number (14823920).

Almost surely, 2^87831489 is an apocalyptic number.

It is an amenable number.

87831489 is a deficient number, since it is larger than the sum of its proper divisors (30759871).

87831489 is a wasteful number, since it uses less digits than its factorization.

87831489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370679.

The product of its digits is 387072, while the sum is 48.

The square root of 87831489 is about 9371.8455493035. The cubic root of 87831489 is about 444.5119237380.

The spelling of 87831489 in words is "eighty-seven million, eight hundred thirty-one thousand, four hundred eighty-nine".