139980943 has 4 divisors (see below), whose sum is σ = 140538888. Its totient is φ = 139423000.

The previous prime is 139980937. The next prime is 139980959. The reversal of 139980943 is 349089931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 139980943 - 2¹³ = 139972751 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139980893 and 139980902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139980343) 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, 278596 + ... + 279097.

It is an arithmetic number, because the mean of its divisors is an integer number (35134722).

Almost surely, 2^139980943 is an apocalyptic number.

139980943 is a deficient number, since it is larger than the sum of its proper divisors (557945).

139980943 is an equidigital number, since it uses as much as digits as its factorization.

139980943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557944.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 139980943 is about 11831.3542335609. The cubic root of 139980943 is about 519.2258487922.

The spelling of 139980943 in words is "one hundred thirty-nine million, nine hundred eighty thousand, nine hundred forty-three".