138862087 has 8 divisors (see below), whose sum is σ = 170907296. Its totient is φ = 109868832.

The previous prime is 138862079. The next prime is 138862099. The reversal of 138862087 is 780268831.

It is a happy number.

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 138862087 - 2³ = 138862079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138862027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 762888 + ... + 763069.

It is an arithmetic number, because the mean of its divisors is an integer number (21363412).

Almost surely, 2^138862087 is an apocalyptic number.

138862087 is a deficient number, since it is larger than the sum of its proper divisors (32045209).

138862087 is a wasteful number, since it uses less digits than its factorization.

138862087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525977.

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 138862087 is about 11783.9758570696. The cubic root of 138862087 is about 517.8387703025.

The spelling of 138862087 in words is "one hundred thirty-eight million, eight hundred sixty-two thousand, eighty-seven".