87109394 has 16 divisors (see below), whose sum is σ = 138607200. Its totient is φ = 40916544.

The previous prime is 87109391. The next prime is 87109397. The reversal of 87109394 is 49390178.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (87109391) and next prime (87109397).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87109391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18977 + ... + 23115.

It is an arithmetic number, because the mean of its divisors is an integer number (8662950).

Almost surely, 2^87109394 is an apocalyptic number.

87109394 is a deficient number, since it is larger than the sum of its proper divisors (51497806).

87109394 is a wasteful number, since it uses less digits than its factorization.

87109394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4777.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 87109394 is about 9333.2413447848. The cubic root of 87109394 is about 443.2904046975.

The spelling of 87109394 in words is "eighty-seven million, one hundred nine thousand, three hundred ninety-four".