138115497 has 16 divisors (see below), whose sum is σ = 209986560. Its totient is φ = 79994112.

The previous prime is 138115477. The next prime is 138115499. The reversal of 138115497 is 794511831.

It is not a de Polignac number, because 138115497 - 2⁶ = 138115433 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (138115499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103497 + ... + 104822.

It is an arithmetic number, because the mean of its divisors is an integer number (13124160).

Almost surely, 2^138115497 is an apocalyptic number.

138115497 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

138115497 is a deficient number, since it is larger than the sum of its proper divisors (71871063).

138115497 is a wasteful number, since it uses less digits than its factorization.

138115497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208352.

The product of its digits is 30240, while the sum is 39.

The square root of 138115497 is about 11752.2549751101. The cubic root of 138115497 is about 516.9090512159.

The spelling of 138115497 in words is "one hundred thirty-eight million, one hundred fifteen thousand, four hundred ninety-seven".