919641313 has 2 divisors, whose sum is σ = 919641314. Its totient is φ = 919641312.

The previous prime is 919641311. The next prime is 919641323. The reversal of 919641313 is 313146919.

919641313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 742671504 + 176969809 = 27252^2 + 13303^2 .

It is a cyclic number.

It is not a de Polignac number, because 919641313 - 2¹ = 919641311 is a prime.

It is a super-3 number, since 3×919641313³ (a number of 28 digits) contains 333 as substring.

Together with 919641311, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (919641311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459820656 + 459820657.

It is an arithmetic number, because the mean of its divisors is an integer number (459820657).

Almost surely, 2^919641313 is an apocalyptic number.

It is an amenable number.

919641313 is a deficient number, since it is larger than the sum of its proper divisors (1).

919641313 is an equidigital number, since it uses as much as digits as its factorization.

919641313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 37.

The square root of 919641313 is about 30325.5884196828. The cubic root of 919641313 is about 972.4624130612.

The spelling of 919641313 in words is "nine hundred nineteen million, six hundred forty-one thousand, three hundred thirteen".