139905793 has 4 divisors (see below), whose sum is σ = 142882560. Its totient is φ = 136929028.

The previous prime is 139905749. The next prime is 139905809. The reversal of 139905793 is 397509931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 139905793 - 2⁹ = 139905281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139905593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1488313 + ... + 1488406.

It is an arithmetic number, because the mean of its divisors is an integer number (35720640).

Almost surely, 2^139905793 is an apocalyptic number.

It is an amenable number.

139905793 is a deficient number, since it is larger than the sum of its proper divisors (2976767).

139905793 is an equidigital number, since it uses as much as digits as its factorization.

139905793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2976766.

The product of its (nonzero) digits is 229635, while the sum is 46.

The square root of 139905793 is about 11828.1779239239. The cubic root of 139905793 is about 519.1329151721.

The spelling of 139905793 in words is "one hundred thirty-nine million, nine hundred five thousand, seven hundred ninety-three".