345204557 has 2 divisors, whose sum is σ = 345204558. Its totient is φ = 345204556.

The previous prime is 345204511. The next prime is 345204599. The reversal of 345204557 is 755402543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 175006441 + 170198116 = 13229^2 + 13046^2 .

It is a cyclic number.

It is not a de Polignac number, because 345204557 - 2¹⁸ = 344942413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345204157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172602278 + 172602279.

It is an arithmetic number, because the mean of its divisors is an integer number (172602279).

Almost surely, 2^345204557 is an apocalyptic number.

It is an amenable number.

345204557 is a deficient number, since it is larger than the sum of its proper divisors (1).

345204557 is an equidigital number, since it uses as much as digits as its factorization.

345204557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84000, while the sum is 35.

The square root of 345204557 is about 18579.6812943602. The cubic root of 345204557 is about 701.4964970689.

The spelling of 345204557 in words is "three hundred forty-five million, two hundred four thousand, five hundred fifty-seven".