345531619 has 2 divisors, whose sum is σ = 345531620. Its totient is φ = 345531618.

The previous prime is 345531577. The next prime is 345531623. The reversal of 345531619 is 916135543.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 345531619 - 2⁹ = 345531107 is a prime.

It is a super-2 number, since 2×345531619² = 238784199457522322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (345532619) 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, 172765809 + 172765810.

It is an arithmetic number, because the mean of its divisors is an integer number (172765810).

Almost surely, 2^345531619 is an apocalyptic number.

345531619 is a deficient number, since it is larger than the sum of its proper divisors (1).

345531619 is an equidigital number, since it uses as much as digits as its factorization.

345531619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 37.

The square root of 345531619 is about 18588.4808147412. The cubic root of 345531619 is about 701.7179700309.

The spelling of 345531619 in words is "three hundred forty-five million, five hundred thirty-one thousand, six hundred nineteen".