345772813 has 2 divisors, whose sum is σ = 345772814. Its totient is φ = 345772812.

The previous prime is 345772799. The next prime is 345772879. The reversal of 345772813 is 318277543.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 269682084 + 76090729 = 16422^2 + 8723^2 .

It is a cyclic number.

It is not a de Polignac number, because 345772813 - 2¹³ = 345764621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345772883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172886406 + 172886407.

It is an arithmetic number, because the mean of its divisors is an integer number (172886407).

Almost surely, 2^345772813 is an apocalyptic number.

It is an amenable number.

345772813 is a deficient number, since it is larger than the sum of its proper divisors (1).

345772813 is an equidigital number, since it uses as much as digits as its factorization.

345772813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 40.

The square root of 345772813 is about 18594.9674105657. The cubic root of 345772813 is about 701.8812071888.

The spelling of 345772813 in words is "three hundred forty-five million, seven hundred seventy-two thousand, eight hundred thirteen".