919489720339 has 2 divisors, whose sum is σ = 919489720340. Its totient is φ = 919489720338.

The previous prime is 919489720309. The next prime is 919489720393. The reversal of 919489720339 is 933027984919.

919489720339 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (919489720393) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 919489720339 - 2⁵ = 919489720307 is a prime.

It is a super-2 number, since 2×919489720339² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (919489720309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459744860169 + 459744860170.

It is an arithmetic number, because the mean of its divisors is an integer number (459744860170).

Almost surely, 2^919489720339 is an apocalyptic number.

919489720339 is a deficient number, since it is larger than the sum of its proper divisors (1).

919489720339 is an equidigital number, since it uses as much as digits as its factorization.

919489720339 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26453952, while the sum is 64.

The spelling of 919489720339 in words is "nine hundred nineteen billion, four hundred eighty-nine million, seven hundred twenty thousand, three hundred thirty-nine".