342978997 has 2 divisors, whose sum is σ = 342978998. Its totient is φ = 342978996.

The previous prime is 342978959. The next prime is 342979031. The reversal of 342978997 is 799879243.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 331749796 + 11229201 = 18214^2 + 3351^2 .

It is an emirp because it is prime and its reverse (799879243) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-342978997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (342978917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171489498 + 171489499.

It is an arithmetic number, because the mean of its divisors is an integer number (171489499).

Almost surely, 2^342978997 is an apocalyptic number.

It is an amenable number.

342978997 is a deficient number, since it is larger than the sum of its proper divisors (1).

342978997 is an equidigital number, since it uses as much as digits as its factorization.

342978997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6858432, while the sum is 58.

The square root of 342978997 is about 18519.6921410697. The cubic root of 342978997 is about 699.9857119533.

The spelling of 342978997 in words is "three hundred forty-two million, nine hundred seventy-eight thousand, nine hundred ninety-seven".