139897007 has 4 divisors (see below), whose sum is σ = 140272440. Its totient is φ = 139521576.

The previous prime is 139897003. The next prime is 139897027. The reversal of 139897007 is 700798931.

139897007 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 139897007 - 2² = 139897003 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 (139897003) 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, 187157 + ... + 187902.

It is an arithmetic number, because the mean of its divisors is an integer number (35068110).

Almost surely, 2^139897007 is an apocalyptic number.

139897007 is a deficient number, since it is larger than the sum of its proper divisors (375433).

139897007 is an equidigital number, since it uses as much as digits as its factorization.

139897007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375432.

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 139897007 is about 11827.8065168483. The cubic root of 139897007 is about 519.1220478659.

The spelling of 139897007 in words is "one hundred thirty-nine million, eight hundred ninety-seven thousand, seven".