139913997 has 8 divisors (see below), whose sum is σ = 186615744. Its totient is φ = 93244128.

The previous prime is 139913993. The next prime is 139914007. The reversal of 139913997 is 799319931.

139913997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 139913997 - 2² = 139913993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139913993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5553 + ... + 17625.

It is an arithmetic number, because the mean of its divisors is an integer number (23326968).

Almost surely, 2^139913997 is an apocalyptic number.

It is an amenable number.

139913997 is a deficient number, since it is larger than the sum of its proper divisors (46701747).

139913997 is a wasteful number, since it uses less digits than its factorization.

139913997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15939.

The product of its digits is 413343, while the sum is 51.

The square root of 139913997 is about 11828.5247178167. The cubic root of 139913997 is about 519.1430621982.

The spelling of 139913997 in words is "one hundred thirty-nine million, nine hundred thirteen thousand, nine hundred ninety-seven".