139859965 has 16 divisors (see below), whose sum is σ = 195724800. Its totient is φ = 95902800.

The previous prime is 139859957. The next prime is 139859999. The reversal of 139859965 is 569958931.

It is not a de Polignac number, because 139859965 - 2³ = 139859957 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39061 + ... + 42490.

It is an arithmetic number, because the mean of its divisors is an integer number (12232800).

Almost surely, 2^139859965 is an apocalyptic number.

It is an amenable number.

139859965 is a deficient number, since it is larger than the sum of its proper divisors (55864835).

139859965 is an frugal number, since it uses more digits than its factorization.

139859965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81577 (or 81563 counting only the distinct ones).

The product of its digits is 2624400, while the sum is 55.

The square root of 139859965 is about 11826.2405268961. The cubic root of 139859965 is about 519.0762260223.

The spelling of 139859965 in words is "one hundred thirty-nine million, eight hundred fifty-nine thousand, nine hundred sixty-five".