87638069 has 8 divisors (see below), whose sum is σ = 90383040. Its totient is φ = 84935200.

The previous prime is 87638021. The next prime is 87638101. The reversal of 87638069 is 96083678.

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

It is a cyclic number.

It is not a de Polignac number, because 87638069 - 2²⁰ = 86589493 is a prime.

It is a super-2 number, since 2×87638069² = 15360862276097522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87638669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6272 + ... + 14649.

It is an arithmetic number, because the mean of its divisors is an integer number (11297880).

Almost surely, 2^87638069 is an apocalyptic number.

It is an amenable number.

87638069 is a deficient number, since it is larger than the sum of its proper divisors (2744971).

87638069 is a wasteful number, since it uses less digits than its factorization.

87638069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21051.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 87638069 is about 9361.5206563891. The cubic root of 87638069 is about 444.1853867637.

The spelling of 87638069 in words is "eighty-seven million, six hundred thirty-eight thousand, sixty-nine".