87964138 has 8 divisors (see below), whose sum is σ = 132909732. Its totient is φ = 43660896.

The previous prime is 87964127. The next prime is 87964139. The reversal of 87964138 is 83146978.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 84327489 + 3636649 = 9183^2 + 1907^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (87964139) 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, 160245 + ... + 160792.

Almost surely, 2^87964138 is an apocalyptic number.

87964138 is a deficient number, since it is larger than the sum of its proper divisors (44945594).

87964138 is a wasteful number, since it uses less digits than its factorization.

87964138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321176.

The product of its digits is 290304, while the sum is 46.

The square root of 87964138 is about 9378.9198738447. The cubic root of 87964138 is about 444.7355884088.

The spelling of 87964138 in words is "eighty-seven million, nine hundred sixty-four thousand, one hundred thirty-eight".