139830297 has 4 divisors (see below), whose sum is σ = 186440400. Its totient is φ = 93220196.

The previous prime is 139830277. The next prime is 139830307. The reversal of 139830297 is 792038931.

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 139830297 - 2⁶ = 139830233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139830227) 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, 23305047 + ... + 23305052.

It is an arithmetic number, because the mean of its divisors is an integer number (46610100).

Almost surely, 2^139830297 is an apocalyptic number.

It is an amenable number.

139830297 is a deficient number, since it is larger than the sum of its proper divisors (46610103).

139830297 is an equidigital number, since it uses as much as digits as its factorization.

139830297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46610102.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 139830297 is about 11824.9861310701. The cubic root of 139830297 is about 519.0395201584.

The spelling of 139830297 in words is "one hundred thirty-nine million, eight hundred thirty thousand, two hundred ninety-seven".