3219649919 has 6 divisors (see below), whose sum is σ = 3334501560. Its totient is φ = 3108626696.

The previous prime is 3219649903. The next prime is 3219649973. The reversal of 3219649919 is 9199469123.

It is a happy number.

It is not a de Polignac number, because 3219649919 - 2⁴ = 3219649903 is a prime.

It is a super-2 number, since 2×3219649919² = 20732291201833413122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3219649999) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1913339 + ... + 1915020.

It is an arithmetic number, because the mean of its divisors is an integer number (555750260).

Almost surely, 2^3219649919 is an apocalyptic number.

3219649919 is a deficient number, since it is larger than the sum of its proper divisors (114851641).

3219649919 is an equidigital number, since it uses as much as digits as its factorization.

3219649919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3828417 (or 3828388 counting only the distinct ones).

The product of its digits is 944784, while the sum is 53.

The square root of 3219649919 is about 56741.9590691051. The cubic root of 3219649919 is about 1476.6227348485.

The spelling of 3219649919 in words is "three billion, two hundred nineteen million, six hundred forty-nine thousand, nine hundred nineteen".