139309023739 has 4 divisors (see below), whose sum is σ = 146641077640. Its totient is φ = 131976969840.

The previous prime is 139309023727. The next prime is 139309023761. The reversal of 139309023739 is 937320903931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 937320903931 = 774833 ⋅1209707.

It is a cyclic number.

It is not a de Polignac number, because 139309023739 - 2⁷ = 139309023611 is a prime.

It is a super-2 number, since 2×139309023739² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139309023692 and 139309023701.

It is not an unprimeable number, because it can be changed into a prime (139309024739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3666026922 + ... + 3666026959.

It is an arithmetic number, because the mean of its divisors is an integer number (36660269410).

Almost surely, 2^139309023739 is an apocalyptic number.

139309023739 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

139309023739 is a deficient number, since it is larger than the sum of its proper divisors (7332053901).

139309023739 is an equidigital number, since it uses as much as digits as its factorization.

139309023739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7332053900.

The product of its (nonzero) digits is 826686, while the sum is 49.

The spelling of 139309023739 in words is "one hundred thirty-nine billion, three hundred nine million, twenty-three thousand, seven hundred thirty-nine".