138962665 has 8 divisors (see below), whose sum is σ = 174005568. Its totient is φ = 106336560.

The previous prime is 138962657. The next prime is 138962689. The reversal of 138962665 is 566269831.

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

It is not a de Polignac number, because 138962665 - 2³ = 138962657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 604071 + ... + 604300.

It is an arithmetic number, because the mean of its divisors is an integer number (21750696).

Almost surely, 2^138962665 is an apocalyptic number.

It is an amenable number.

138962665 is a deficient number, since it is larger than the sum of its proper divisors (35042903).

138962665 is a wasteful number, since it uses less digits than its factorization.

138962665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208399.

The product of its digits is 466560, while the sum is 46.

The square root of 138962665 is about 11788.2426595316. The cubic root of 138962665 is about 517.9637639068.

It can be divided in two parts, 13896 and 2665, that added together give a palindrome (16561).

The spelling of 138962665 in words is "one hundred thirty-eight million, nine hundred sixty-two thousand, six hundred sixty-five".