139682643 has 4 divisors (see below), whose sum is σ = 186243528. Its totient is φ = 93121760.

The previous prime is 139682581. The next prime is 139682663. The reversal of 139682643 is 346286931.

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 139682643 - 2²¹ = 137585491 is a prime.

It is a super-2 number, since 2×139682643² = 39022481510930898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 139682595 and 139682604.

It is not an unprimeable number, because it can be changed into a prime (139682663) 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 3 ways as a sum of consecutive naturals, for example, 23280438 + ... + 23280443.

It is an arithmetic number, because the mean of its divisors is an integer number (46560882).

Almost surely, 2^139682643 is an apocalyptic number.

139682643 is a deficient number, since it is larger than the sum of its proper divisors (46560885).

139682643 is an equidigital number, since it uses as much as digits as its factorization.

139682643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46560884.

The product of its digits is 186624, while the sum is 42.

The square root of 139682643 is about 11818.7411766228. The cubic root of 139682643 is about 518.8567623102.

The spelling of 139682643 in words is "one hundred thirty-nine million, six hundred eighty-two thousand, six hundred forty-three".