1220349619 has 2 divisors, whose sum is σ = 1220349620. Its totient is φ = 1220349618.

The previous prime is 1220349601. The next prime is 1220349623. The reversal of 1220349619 is 9169430221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220349619 - 2⁵ = 1220349587 is a prime.

It is a super-2 number, since 2×1220349619² = 2978506385186890322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1220349629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610174809 + 610174810.

It is an arithmetic number, because the mean of its divisors is an integer number (610174810).

Almost surely, 2^1220349619 is an apocalyptic number.

1220349619 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220349619 is an equidigital number, since it uses as much as digits as its factorization.

1220349619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 1220349619 is about 34933.5028160647. The cubic root of 1220349619 is about 1068.6317909728.

The spelling of 1220349619 in words is "one billion, two hundred twenty million, three hundred forty-nine thousand, six hundred nineteen".