87239105 has 16 divisors (see below), whose sum is σ = 108654480. Its totient is φ = 67162368.

The previous prime is 87239101. The next prime is 87239107. The reversal of 87239105 is 50193278.

It can be written as a sum of positive squares in 8 ways, for example, as 59536 + 87179569 = 244^2 + 9337^2 .

It is a cyclic number.

It is not a de Polignac number, because 87239105 - 2² = 87239101 is a prime.

It is a super-2 number, since 2×87239105² = 15221322882402050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87239101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53279 + ... + 54891.

It is an arithmetic number, because the mean of its divisors is an integer number (6790905).

Almost surely, 2^87239105 is an apocalyptic number.

It is an amenable number.

87239105 is a deficient number, since it is larger than the sum of its proper divisors (21415375).

87239105 is a wasteful number, since it uses less digits than its factorization.

87239105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 87239105 is about 9340.1876319483. The cubic root of 87239105 is about 443.5103240522.

The spelling of 87239105 in words is "eighty-seven million, two hundred thirty-nine thousand, one hundred five".