139705065 has 96 divisors (see below), whose sum is σ = 272802816. Its totient is φ = 65802240.

The previous prime is 139705039. The next prime is 139705079. The reversal of 139705065 is 560507931.

It is a happy number.

It is not a de Polignac number, because 139705065 - 2⁶ = 139705001 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1019677 + ... + 1019813.

It is an arithmetic number, because the mean of its divisors is an integer number (2841696).

Almost surely, 2^139705065 is an apocalyptic number.

139705065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139705065 is a deficient number, since it is larger than the sum of its proper divisors (133097751).

139705065 is a wasteful number, since it uses less digits than its factorization.

139705065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 36.

The square root of 139705065 is about 11819.6897167396. The cubic root of 139705065 is about 518.8845232967.

The spelling of 139705065 in words is "one hundred thirty-nine million, seven hundred five thousand, sixty-five".