138601087 has 2 divisors, whose sum is σ = 138601088. Its totient is φ = 138601086.

The previous prime is 138601081. The next prime is 138601103. The reversal of 138601087 is 780106831.

138601087 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138601087 - 2³ = 138601079 is a prime.

It is a super-2 number, since 2×138601087² = 38420522635163138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138601081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69300543 + 69300544.

It is an arithmetic number, because the mean of its divisors is an integer number (69300544).

Almost surely, 2^138601087 is an apocalyptic number.

138601087 is a deficient number, since it is larger than the sum of its proper divisors (1).

138601087 is an equidigital number, since it uses as much as digits as its factorization.

138601087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 138601087 is about 11772.8962876601. The cubic root of 138601087 is about 517.5141300101.

The spelling of 138601087 in words is "one hundred thirty-eight million, six hundred one thousand, eighty-seven".