87138199 has 8 divisors (see below), whose sum is σ = 91854000. Its totient is φ = 82435392.

The previous prime is 87138193. The next prime is 87138203. The reversal of 87138199 is 99183178.

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 87138199 - 2¹¹ = 87136151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87138193) 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, 12537 + ... + 18205.

It is an arithmetic number, because the mean of its divisors is an integer number (11481750).

Almost surely, 2^87138199 is an apocalyptic number.

87138199 is a deficient number, since it is larger than the sum of its proper divisors (4715801).

87138199 is a wasteful number, since it uses less digits than its factorization.

87138199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6497.

The product of its digits is 108864, while the sum is 46.

The square root of 87138199 is about 9334.7843574450. The cubic root of 87138199 is about 443.3392611691.

The spelling of 87138199 in words is "eighty-seven million, one hundred thirty-eight thousand, one hundred ninety-nine".