139996297 has 4 divisors (see below), whose sum is σ = 159995776. Its totient is φ = 119996820.

The previous prime is 139996289. The next prime is 139996303. The reversal of 139996297 is 792699931.

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 139996297 - 2³ = 139996289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139996897) 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, 9999729 + ... + 9999742.

It is an arithmetic number, because the mean of its divisors is an integer number (39998944).

Almost surely, 2^139996297 is an apocalyptic number.

It is an amenable number.

139996297 is a deficient number, since it is larger than the sum of its proper divisors (19999479).

139996297 is an equidigital number, since it uses as much as digits as its factorization.

139996297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19999478.

The product of its digits is 1653372, while the sum is 55.

The square root of 139996297 is about 11832.0030848542. The cubic root of 139996297 is about 519.2448320958.

The spelling of 139996297 in words is "one hundred thirty-nine million, nine hundred ninety-six thousand, two hundred ninety-seven".