87061131 has 24 divisors (see below), whose sum is σ = 133548480. Its totient is φ = 54464256.

The previous prime is 87061129. The next prime is 87061133. The reversal of 87061131 is 13116078.

It is an interprime number because it is at equal distance from previous prime (87061129) and next prime (87061133).

It is not a de Polignac number, because 87061131 - 2¹ = 87061129 is a prime.

It is a super-2 number, since 2×87061131² = 15159281061998322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 87061095 and 87061104.

It is not an unprimeable number, because it can be changed into a prime (87061133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70225 + ... + 71453.

It is an arithmetic number, because the mean of its divisors is an integer number (5564520).

Almost surely, 2^87061131 is an apocalyptic number.

87061131 is a deficient number, since it is larger than the sum of its proper divisors (46487349).

87061131 is a wasteful number, since it uses less digits than its factorization.

87061131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715 (or 1712 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 87061131 is about 9330.6554432151. The cubic root of 87061131 is about 443.2085211552.

It can be divided in two parts, 870 and 61131, that added together give a square (62001 = 249²).

The spelling of 87061131 in words is "eighty-seven million, sixty-one thousand, one hundred thirty-one".