87031492 has 6 divisors (see below), whose sum is σ = 152305118. Its totient is φ = 43515744.

The previous prime is 87031463. The next prime is 87031493. The reversal of 87031492 is 29413078.

It can be written as a sum of positive squares in only one way, i.e., 59845696 + 27185796 = 7736^2 + 5214^2 .

It is not an unprimeable number, because it can be changed into a prime (87031493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10878933 + ... + 10878940.

Almost surely, 2^87031492 is an apocalyptic number.

It is an amenable number.

87031492 is a deficient number, since it is larger than the sum of its proper divisors (65273626).

87031492 is a wasteful number, since it uses less digits than its factorization.

87031492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21757877 (or 21757875 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 87031492 is about 9329.0670487461. The cubic root of 87031492 is about 443.1582202989.

The spelling of 87031492 in words is "eighty-seven million, thirty-one thousand, four hundred ninety-two".