345556997 has 2 divisors, whose sum is σ = 345556998. Its totient is φ = 345556996.

The previous prime is 345556993. The next prime is 345557039. The reversal of 345556997 is 799655543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 309724801 + 35832196 = 17599^2 + 5986^2 .

It is a cyclic number.

It is not a de Polignac number, because 345556997 - 2² = 345556993 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345556993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172778498 + 172778499.

It is an arithmetic number, because the mean of its divisors is an integer number (172778499).

Almost surely, 2^345556997 is an apocalyptic number.

It is an amenable number.

345556997 is a deficient number, since it is larger than the sum of its proper divisors (1).

345556997 is an equidigital number, since it uses as much as digits as its factorization.

345556997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5103000, while the sum is 53.

The square root of 345556997 is about 18589.1634292671. The cubic root of 345556997 is about 701.7351491270.

The spelling of 345556997 in words is "three hundred forty-five million, five hundred fifty-six thousand, nine hundred ninety-seven".