345561877 has 2 divisors, whose sum is σ = 345561878. Its totient is φ = 345561876.

The previous prime is 345561871. The next prime is 345561919. The reversal of 345561877 is 778165543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 328841956 + 16719921 = 18134^2 + 4089^2 .

It is a cyclic number.

It is not a de Polignac number, because 345561877 - 2³ = 345561869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345561871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172780938 + 172780939.

It is an arithmetic number, because the mean of its divisors is an integer number (172780939).

Almost surely, 2^345561877 is an apocalyptic number.

It is an amenable number.

345561877 is a deficient number, since it is larger than the sum of its proper divisors (1).

345561877 is an equidigital number, since it uses as much as digits as its factorization.

345561877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 705600, while the sum is 46.

The square root of 345561877 is about 18589.2946880725. The cubic root of 345561877 is about 701.7384524425.

The spelling of 345561877 in words is "three hundred forty-five million, five hundred sixty-one thousand, eight hundred seventy-seven".