138967258 has 8 divisors (see below), whose sum is σ = 209346228. Its totient is φ = 69185184.

The previous prime is 138967249. The next prime is 138967277. The reversal of 138967258 is 852769831.

It can be written as a sum of positive squares in 2 ways, for example, as 136726249 + 2241009 = 11693^2 + 1497^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148641 + ... + 149572.

Almost surely, 2^138967258 is an apocalyptic number.

138967258 is a deficient number, since it is larger than the sum of its proper divisors (70378970).

138967258 is a wasteful number, since it uses less digits than its factorization.

138967258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298448.

The product of its digits is 725760, while the sum is 49.

The square root of 138967258 is about 11788.4374706744. The cubic root of 138967258 is about 517.9694704308.

The spelling of 138967258 in words is "one hundred thirty-eight million, nine hundred sixty-seven thousand, two hundred fifty-eight".