139507645 has 8 divisors (see below), whose sum is σ = 169426656. Its totient is φ = 110261136.

The previous prime is 139507639. The next prime is 139507651. The reversal of 139507645 is 546705931.

It is an interprime number because it is at equal distance from previous prime (139507639) and next prime (139507651).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 139507645 - 2⁷ = 139507517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139507598 and 139507607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167667 + ... + 168496.

It is an arithmetic number, because the mean of its divisors is an integer number (21178332).

Almost surely, 2^139507645 is an apocalyptic number.

It is an amenable number.

139507645 is a deficient number, since it is larger than the sum of its proper divisors (29919011).

139507645 is an equidigital number, since it uses as much as digits as its factorization.

139507645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336251.

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 139507645 is about 11811.3354452407. The cubic root of 139507645 is about 518.6399927375.

The spelling of 139507645 in words is "one hundred thirty-nine million, five hundred seven thousand, six hundred forty-five".