138395297 has 8 divisors (see below), whose sum is σ = 148149600. Its totient is φ = 128888064.

The previous prime is 138395291. The next prime is 138395339. The reversal of 138395297 is 792593831.

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 138395297 - 2⁶ = 138395233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138395291) 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, 60608 + ... + 62849.

It is an arithmetic number, because the mean of its divisors is an integer number (18518700).

Almost surely, 2^138395297 is an apocalyptic number.

It is an amenable number.

138395297 is a deficient number, since it is larger than the sum of its proper divisors (9754303).

138395297 is a wasteful number, since it uses less digits than its factorization.

138395297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123535.

The product of its digits is 408240, while the sum is 47.

The square root of 138395297 is about 11764.1530506875. The cubic root of 138395297 is about 517.2578742394.

The spelling of 138395297 in words is "one hundred thirty-eight million, three hundred ninety-five thousand, two hundred ninety-seven".