87345172 has 12 divisors (see below), whose sum is σ = 153970740. Its totient is φ = 43353536.

The previous prime is 87345151. The next prime is 87345173. The reversal of 87345172 is 27154378.

It can be written as a sum of positive squares in 2 ways, for example, as 67667076 + 19678096 = 8226^2 + 4436^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87345173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79147 + ... + 80242.

It is an arithmetic number, because the mean of its divisors is an integer number (12830895).

Almost surely, 2^87345172 is an apocalyptic number.

It is an amenable number.

87345172 is a deficient number, since it is larger than the sum of its proper divisors (66625568).

87345172 is a wasteful number, since it uses less digits than its factorization.

87345172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159530 (or 159528 counting only the distinct ones).

The product of its digits is 47040, while the sum is 37.

The square root of 87345172 is about 9345.8638980032. The cubic root of 87345172 is about 443.6899940814.

The spelling of 87345172 in words is "eighty-seven million, three hundred forty-five thousand, one hundred seventy-two".