619795081 has 2 divisors, whose sum is σ = 619795082. Its totient is φ = 619795080.

The previous prime is 619795069. The next prime is 619795087. The reversal of 619795081 is 180597916.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 572405625 + 47389456 = 23925^2 + 6884^2 .

It is a cyclic number.

It is not a de Polignac number, because 619795081 - 2⁵ = 619795049 is a prime.

It is a super-2 number, since 2×619795081² = 768291884863593122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (619795087) 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, 309897540 + 309897541.

It is an arithmetic number, because the mean of its divisors is an integer number (309897541).

Almost surely, 2^619795081 is an apocalyptic number.

It is an amenable number.

619795081 is a deficient number, since it is larger than the sum of its proper divisors (1).

619795081 is an equidigital number, since it uses as much as digits as its factorization.

619795081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 46.

The square root of 619795081 is about 24895.6839833735. The cubic root of 619795081 is about 852.6079445246.

The spelling of 619795081 in words is "six hundred nineteen million, seven hundred ninety-five thousand, eighty-one".