19401313 has 2 divisors, whose sum is σ = 19401314. Its totient is φ = 19401312.

The previous prime is 19401307. The next prime is 19401329. The reversal of 19401313 is 31310491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18249984 + 1151329 = 4272^2 + 1073^2 .

It is an emirp because it is prime and its reverse (31310491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19401313 - 2¹⁷ = 19270241 is a prime.

It is a super-2 number, since 2×19401313² = 752821892247938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19401353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9700656 + 9700657.

It is an arithmetic number, because the mean of its divisors is an integer number (9700657).

Almost surely, 2^19401313 is an apocalyptic number.

It is an amenable number.

19401313 is a deficient number, since it is larger than the sum of its proper divisors (1).

19401313 is an equidigital number, since it uses as much as digits as its factorization.

19401313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 19401313 is about 4404.6921572341. The cubic root of 19401313 is about 268.7057999782.

The spelling of 19401313 in words is "nineteen million, four hundred one thousand, three hundred thirteen".