612780019 has 2 divisors, whose sum is σ = 612780020. Its totient is φ = 612780018.

The previous prime is 612779989. The next prime is 612780043. The reversal of 612780019 is 910087216.

It is a happy number.

612780019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 612780019 - 2²⁵ = 579225587 is a prime.

It is a super-2 number, since 2×612780019² = 750998703371280722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (612780059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306390009 + 306390010.

It is an arithmetic number, because the mean of its divisors is an integer number (306390010).

Almost surely, 2^612780019 is an apocalyptic number.

612780019 is a deficient number, since it is larger than the sum of its proper divisors (1).

612780019 is an equidigital number, since it uses as much as digits as its factorization.

612780019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 612780019 is about 24754.3939331990. The cubic root of 612780019 is about 849.3790246519.

The spelling of 612780019 in words is "six hundred twelve million, seven hundred eighty thousand, nineteen".