138107247 has 8 divisors (see below), whose sum is σ = 186474240. Its totient is φ = 90905880.

The previous prime is 138107239. The next prime is 138107267. The reversal of 138107247 is 742701831.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138107247 - 2³ = 138107239 is a prime.

It is a super-2 number, since 2×138107247² = 38147223347838018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138107267) 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, 291129 + ... + 291602.

It is an arithmetic number, because the mean of its divisors is an integer number (23309280).

Almost surely, 2^138107247 is an apocalyptic number.

138107247 is a deficient number, since it is larger than the sum of its proper divisors (48366993).

138107247 is an equidigital number, since it uses as much as digits as its factorization.

138107247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582813.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 138107247 is about 11751.9039733994. The cubic root of 138107247 is about 516.8987589010.

The spelling of 138107247 in words is "one hundred thirty-eight million, one hundred seven thousand, two hundred forty-seven".