138294859 has 4 divisors (see below), whose sum is σ = 138594016. Its totient is φ = 137995704.

The previous prime is 138294857. The next prime is 138294889. The reversal of 138294859 is 958492831.

138294859 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, and also an emirpimes, since its reverse is a distinct semiprime: 958492831 = 683 ⋅1403357.

It is a cyclic number.

It is not a de Polignac number, because 138294859 - 2¹ = 138294857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138294857) 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, 148884 + ... + 149809.

It is an arithmetic number, because the mean of its divisors is an integer number (34648504).

Almost surely, 2^138294859 is an apocalyptic number.

138294859 is a deficient number, since it is larger than the sum of its proper divisors (299157).

138294859 is an equidigital number, since it uses as much as digits as its factorization.

138294859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299156.

The product of its digits is 622080, while the sum is 49.

The square root of 138294859 is about 11759.8834603069. The cubic root of 138294859 is about 517.1327136296.

The spelling of 138294859 in words is "one hundred thirty-eight million, two hundred ninety-four thousand, eight hundred fifty-nine".