138583942 has 8 divisors (see below), whose sum is σ = 237572496. Its totient is φ = 59393112.

The previous prime is 138583897. The next prime is 138583957. The reversal of 138583942 is 249385831.

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

It is a congruent number.

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, 4949413 + ... + 4949440.

It is an arithmetic number, because the mean of its divisors is an integer number (29696562).

Almost surely, 2^138583942 is an apocalyptic number.

138583942 is a deficient number, since it is larger than the sum of its proper divisors (98988554).

138583942 is an equidigital number, since it uses as much as digits as its factorization.

138583942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9898862.

The product of its digits is 207360, while the sum is 43.

The square root of 138583942 is about 11772.1681095710. The cubic root of 138583942 is about 517.4927902408.

The spelling of 138583942 in words is "one hundred thirty-eight million, five hundred eighty-three thousand, nine hundred forty-two".