138157953 has 12 divisors (see below), whose sum is σ = 187019280. Its totient is φ = 90721752.

The previous prime is 138157937. The next prime is 138157961. The reversal of 138157953 is 359751831.

It is not a de Polignac number, because 138157953 - 2⁴ = 138157937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138157933) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8338 + ... + 18596.

It is an arithmetic number, because the mean of its divisors is an integer number (15584940).

Almost surely, 2^138157953 is an apocalyptic number.

It is an amenable number.

138157953 is a deficient number, since it is larger than the sum of its proper divisors (48861327).

138157953 is an equidigital number, since it uses as much as digits as its factorization.

138157953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10396 (or 10329 counting only the distinct ones).

The product of its digits is 113400, while the sum is 42.

The square root of 138157953 is about 11754.0611279676. The cubic root of 138157953 is about 516.9620108593.

The spelling of 138157953 in words is "one hundred thirty-eight million, one hundred fifty-seven thousand, nine hundred fifty-three".