139399692 has 24 divisors (see below), whose sum is σ = 327644016. Its totient is φ = 46126848.

The previous prime is 139399669. The next prime is 139399693. The reversal of 139399692 is 296993931.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (139399693) 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, 40753 + ... + 44040.

It is an arithmetic number, because the mean of its divisors is an integer number (13651834).

Almost surely, 2^139399692 is an apocalyptic number.

139399692 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

139399692 is an abundant number, since it is smaller than the sum of its proper divisors (188244324).

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

139399692 is a wasteful number, since it uses less digits than its factorization.

139399692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84937 (or 84935 counting only the distinct ones).

The product of its digits is 708588, while the sum is 51.

The square root of 139399692 is about 11806.7646711536. The cubic root of 139399692 is about 518.5061812154.

The spelling of 139399692 in words is "one hundred thirty-nine million, three hundred ninety-nine thousand, six hundred ninety-two".