345371861 has 2 divisors, whose sum is σ = 345371862. Its totient is φ = 345371860.

The previous prime is 345371849. The next prime is 345371867. The reversal of 345371861 is 168173543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228191236 + 117180625 = 15106^2 + 10825^2 .

It is a cyclic number.

It is not a de Polignac number, because 345371861 - 2¹⁴ = 345355477 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345371867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172685930 + 172685931.

It is an arithmetic number, because the mean of its divisors is an integer number (172685931).

Almost surely, 2^345371861 is an apocalyptic number.

It is an amenable number.

345371861 is a deficient number, since it is larger than the sum of its proper divisors (1).

345371861 is an equidigital number, since it uses as much as digits as its factorization.

345371861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The square root of 345371861 is about 18584.1830867004. The cubic root of 345371861 is about 701.6098059390.

The spelling of 345371861 in words is "three hundred forty-five million, three hundred seventy-one thousand, eight hundred sixty-one".