138760091 has 8 divisors (see below), whose sum is σ = 139975584. Its totient is φ = 137548800.

The previous prime is 138760051. The next prime is 138760109. The reversal of 138760091 is 190067831.

138760091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 138760091 - 2²² = 134565787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138760051) 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, 119771 + ... + 120923.

It is an arithmetic number, because the mean of its divisors is an integer number (17496948).

Almost surely, 2^138760091 is an apocalyptic number.

138760091 is a deficient number, since it is larger than the sum of its proper divisors (1215493).

138760091 is a wasteful number, since it uses less digits than its factorization.

138760091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 138760091 is about 11779.6473206968. The cubic root of 138760091 is about 517.7119528216.

The spelling of 138760091 in words is "one hundred thirty-eight million, seven hundred sixty thousand, ninety-one".