345047557 has 2 divisors, whose sum is σ = 345047558. Its totient is φ = 345047556.

The previous prime is 345047531. The next prime is 345047579. The reversal of 345047557 is 755740543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 330294276 + 14753281 = 18174^2 + 3841^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345047557 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 (345047957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172523778 + 172523779.

It is an arithmetic number, because the mean of its divisors is an integer number (172523779).

Almost surely, 2^345047557 is an apocalyptic number.

It is an amenable number.

345047557 is a deficient number, since it is larger than the sum of its proper divisors (1).

345047557 is an equidigital number, since it uses as much as digits as its factorization.

345047557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 294000, while the sum is 40.

The square root of 345047557 is about 18575.4557682981. The cubic root of 345047557 is about 701.3901334181.

The spelling of 345047557 in words is "three hundred forty-five million, forty-seven thousand, five hundred fifty-seven".