138096457 has 4 divisors (see below), whose sum is σ = 146219796. Its totient is φ = 129973120.

The previous prime is 138096449. The next prime is 138096461. The reversal of 138096457 is 754690831.

138096457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65999376 + 72097081 = 8124^2 + 8491^2 .

It is a cyclic number.

It is not a de Polignac number, because 138096457 - 2³ = 138096449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138096407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4061644 + ... + 4061677.

It is an arithmetic number, because the mean of its divisors is an integer number (36554949).

Almost surely, 2^138096457 is an apocalyptic number.

138096457 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

138096457 is a deficient number, since it is larger than the sum of its proper divisors (8123339).

138096457 is an equidigital number, since it uses as much as digits as its factorization.

138096457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8123338.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 138096457 is about 11751.4448898848. Note that the first 3 decimals coincide. The cubic root of 138096457 is about 516.8852971820.

The spelling of 138096457 in words is "one hundred thirty-eight million, ninety-six thousand, four hundred fifty-seven".