138245191 has 8 divisors (see below), whose sum is σ = 158674464. Its totient is φ = 117985920.

The previous prime is 138245179. The next prime is 138245231. The reversal of 138245191 is 191542831.

138245191 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 138245191 - 2¹⁵ = 138212423 is a prime.

It is a super-2 number, since 2×138245191² = 38223465669252962, 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 (138245131) 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, 40750 + ... + 44011.

It is an arithmetic number, because the mean of its divisors is an integer number (19834308).

Almost surely, 2^138245191 is an apocalyptic number.

138245191 is a deficient number, since it is larger than the sum of its proper divisors (20429273).

138245191 is an equidigital number, since it uses as much as digits as its factorization.

138245191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85001.

The product of its digits is 8640, while the sum is 34.

The square root of 138245191 is about 11757.7715150448. The cubic root of 138245191 is about 517.0707975582.

The spelling of 138245191 in words is "one hundred thirty-eight million, two hundred forty-five thousand, one hundred ninety-one".