87131045 has 4 divisors (see below), whose sum is σ = 104557260. Its totient is φ = 69704832.

The previous prime is 87130957. The next prime is 87131071. The reversal of 87131045 is 54013178.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54013178 = 2 ⋅27006589.

It can be written as a sum of positive squares in 2 ways, for example, as 35736484 + 51394561 = 5978^2 + 7169^2 .

It is a cyclic number.

It is not a de Polignac number, because 87131045 - 2¹⁴ = 87114661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87130999 and 87131017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8713100 + ... + 8713109.

It is an arithmetic number, because the mean of its divisors is an integer number (26139315).

Almost surely, 2^87131045 is an apocalyptic number.

It is an amenable number.

87131045 is a deficient number, since it is larger than the sum of its proper divisors (17426215).

87131045 is a wasteful number, since it uses less digits than its factorization.

87131045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17426214.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 87131045 is about 9334.4011591532. The cubic root of 87131045 is about 443.3271281975.

The spelling of 87131045 in words is "eighty-seven million, one hundred thirty-one thousand, forty-five".