139987607 has 4 divisors (see below), whose sum is σ = 140179320. Its totient is φ = 139795896.

The previous prime is 139987577. The next prime is 139987633. The reversal of 139987607 is 706789931.

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 139987607 - 2⁶ = 139987543 is a prime.

It is a super-2 number, since 2×139987607² = 39193060227172898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139987657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94757 + ... + 96222.

It is an arithmetic number, because the mean of its divisors is an integer number (35044830).

Almost surely, 2^139987607 is an apocalyptic number.

139987607 is a deficient number, since it is larger than the sum of its proper divisors (191713).

139987607 is an equidigital number, since it uses as much as digits as its factorization.

139987607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191712.

The product of its (nonzero) digits is 571536, while the sum is 50.

The square root of 139987607 is about 11831.6358547751. The cubic root of 139987607 is about 519.2340881665.

The spelling of 139987607 in words is "one hundred thirty-nine million, nine hundred eighty-seven thousand, six hundred seven".