139341918 has 16 divisors (see below), whose sum is σ = 278804880. Its totient is φ = 46427136.

The previous prime is 139341913. The next prime is 139341919. The reversal of 139341918 is 819143931.

It is a happy number.

It is a super-2 number, since 2×139341918² = 38832340223837448, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139341913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18078 + ... + 24606.

It is an arithmetic number, because the mean of its divisors is an integer number (17425305).

Almost surely, 2^139341918 is an apocalyptic number.

139341918 is an abundant number, since it is smaller than the sum of its proper divisors (139462962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139341918 is a wasteful number, since it uses less digits than its factorization.

139341918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10091.

The product of its digits is 23328, while the sum is 39.

The square root of 139341918 is about 11804.3177693588. The cubic root of 139341918 is about 518.4345399392.

The spelling of 139341918 in words is "one hundred thirty-nine million, three hundred forty-one thousand, nine hundred eighteen".