634345619 has 2 divisors, whose sum is σ = 634345620. Its totient is φ = 634345618.

The previous prime is 634345603. The next prime is 634345637. The reversal of 634345619 is 916543436.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 634345619 - 2⁴ = 634345603 is a prime.

It is a super-2 number, since 2×634345619² = 804788728688986322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (634348619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317172809 + 317172810.

It is an arithmetic number, because the mean of its divisors is an integer number (317172810).

Almost surely, 2^634345619 is an apocalyptic number.

634345619 is a deficient number, since it is larger than the sum of its proper divisors (1).

634345619 is an equidigital number, since it uses as much as digits as its factorization.

634345619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 41.

The square root of 634345619 is about 25186.2188309401. The cubic root of 634345619 is about 859.2284494368.

The spelling of 634345619 in words is "six hundred thirty-four million, three hundred forty-five thousand, six hundred nineteen".