87664419 has 12 divisors (see below), whose sum is σ = 130993200. Its totient is φ = 56427504.

The previous prime is 87664399. The next prime is 87664439. The reversal of 87664419 is 91446678.

It is an interprime number because it is at equal distance from previous prime (87664399) and next prime (87664439).

It is not a de Polignac number, because 87664419 - 2⁹ = 87663907 is a prime.

It is a super-2 number, since 2×87664419² = 15370100717215122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87664439) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 167679 + ... + 168200.

It is an arithmetic number, because the mean of its divisors is an integer number (10916100).

Almost surely, 2^87664419 is an apocalyptic number.

87664419 is a deficient number, since it is larger than the sum of its proper divisors (43328781).

87664419 is a wasteful number, since it uses less digits than its factorization.

87664419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335914 (or 335911 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 87664419 is about 9362.9279074443. The cubic root of 87664419 is about 444.2298998093.

The spelling of 87664419 in words is "eighty-seven million, six hundred sixty-four thousand, four hundred nineteen".