139065993 has 24 divisors (see below), whose sum is σ = 219510720. Its totient is φ = 84137760.

The previous prime is 139065989. The next prime is 139066007. The reversal of 139065993 is 399560931.

It is not a de Polignac number, because 139065993 - 2² = 139065989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139065193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96603 + ... + 98031.

It is an arithmetic number, because the mean of its divisors is an integer number (9146280).

Almost surely, 2^139065993 is an apocalyptic number.

It is an amenable number.

139065993 is a deficient number, since it is larger than the sum of its proper divisors (80444727).

139065993 is a wasteful number, since it uses less digits than its factorization.

139065993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2429 (or 2426 counting only the distinct ones).

The product of its (nonzero) digits is 196830, while the sum is 45.

The square root of 139065993 is about 11792.6245170445. The cubic root of 139065993 is about 518.0921122897.

The spelling of 139065993 in words is "one hundred thirty-nine million, sixty-five thousand, nine hundred ninety-three".