139087645 has 8 divisors (see below), whose sum is σ = 169396704. Its totient is φ = 109609104.

The previous prime is 139087643. The next prime is 139087649. The reversal of 139087645 is 546780931.

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 139087645 - 2¹ = 139087643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139087643) 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 7 ways as a sum of consecutive naturals, for example, 207259 + ... + 207928.

It is an arithmetic number, because the mean of its divisors is an integer number (21174588).

Almost surely, 2^139087645 is an apocalyptic number.

It is an amenable number.

139087645 is a deficient number, since it is larger than the sum of its proper divisors (30309059).

139087645 is an equidigital number, since it uses as much as digits as its factorization.

139087645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415259.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 139087645 is about 11793.5425127482. The cubic root of 139087645 is about 518.1189991608.

The spelling of 139087645 in words is "one hundred thirty-nine million, eighty-seven thousand, six hundred forty-five".