139965690 has 32 divisors (see below), whose sum is σ = 336409920. Its totient is φ = 37269504.

The previous prime is 139965689. The next prime is 139965691. The reversal of 139965690 is 96569931.

139965690 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (139965689) and next prime (139965691).

It is a super-2 number, since 2×139965690² = 39180788754352200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139965691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20037 + ... + 26103.

It is an arithmetic number, because the mean of its divisors is an integer number (10512810).

Almost surely, 2^139965690 is an apocalyptic number.

139965690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139965690 is an abundant number, since it is smaller than the sum of its proper divisors (196444230).

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

139965690 is a wasteful number, since it uses less digits than its factorization.

139965690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6846.

The product of its (nonzero) digits is 393660, while the sum is 48.

The square root of 139965690 is about 11830.7096152344. The cubic root of 139965690 is about 519.2069889879.

The spelling of 139965690 in words is "one hundred thirty-nine million, nine hundred sixty-five thousand, six hundred ninety".