339640997 has 2 divisors, whose sum is σ = 339640998. Its totient is φ = 339640996.

The previous prime is 339640963. The next prime is 339641009. The reversal of 339640997 is 799046933.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170406916 + 169234081 = 13054^2 + 13009^2 .

It is a cyclic number.

It is not a de Polignac number, because 339640997 - 2⁶ = 339640933 is a prime.

It is a Chen prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (339640937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169820498 + 169820499.

It is an arithmetic number, because the mean of its divisors is an integer number (169820499).

Almost surely, 2^339640997 is an apocalyptic number.

It is an amenable number.

339640997 is a deficient number, since it is larger than the sum of its proper divisors (1).

339640997 is an equidigital number, since it uses as much as digits as its factorization.

339640997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1102248, while the sum is 50.

The square root of 339640997 is about 18429.3515078529. The cubic root of 339640997 is about 697.7074639686.

The spelling of 339640997 in words is "three hundred thirty-nine million, six hundred forty thousand, nine hundred ninety-seven".