345698819 has 2 divisors, whose sum is σ = 345698820. Its totient is φ = 345698818.

The previous prime is 345698779. The next prime is 345698827. The reversal of 345698819 is 918896543.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345698819 is a prime.

It is a super-2 number, since 2×345698819² = 239015346915989522, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (345698849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172849409 + 172849410.

It is an arithmetic number, because the mean of its divisors is an integer number (172849410).

Almost surely, 2^345698819 is an apocalyptic number.

345698819 is a deficient number, since it is larger than the sum of its proper divisors (1).

345698819 is an equidigital number, since it uses as much as digits as its factorization.

345698819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 53.

The square root of 345698819 is about 18592.9776797586. The cubic root of 345698819 is about 701.8311370260.

The spelling of 345698819 in words is "three hundred forty-five million, six hundred ninety-eight thousand, eight hundred nineteen".