139970717 has 4 divisors (see below), whose sum is σ = 141329760. Its totient is φ = 138611676.

The previous prime is 139970689. The next prime is 139970729. The reversal of 139970717 is 717079931.

It is a happy number.

139970717 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 139970717 - 2¹⁰ = 139969693 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 (139970917) 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, 679367 + ... + 679572.

It is an arithmetic number, because the mean of its divisors is an integer number (35332440).

Almost surely, 2^139970717 is an apocalyptic number.

It is an amenable number.

139970717 is a deficient number, since it is larger than the sum of its proper divisors (1359043).

139970717 is a wasteful number, since it uses less digits than its factorization.

139970717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359042.

The product of its (nonzero) digits is 83349, while the sum is 44.

The square root of 139970717 is about 11830.9220688837. The cubic root of 139970717 is about 519.2132048500.

The spelling of 139970717 in words is "one hundred thirty-nine million, nine hundred seventy thousand, seven hundred seventeen".