19961413 has 2 divisors, whose sum is σ = 19961414. Its totient is φ = 19961412.

The previous prime is 19961393. The next prime is 19961429. The reversal of 19961413 is 31416991.

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., 14424804 + 5536609 = 3798^2 + 2353^2 .

It is a cyclic number.

It is not a de Polignac number, because 19961413 - 2¹⁷ = 19830341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19911413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9980706 + 9980707.

It is an arithmetic number, because the mean of its divisors is an integer number (9980707).

Almost surely, 2^19961413 is an apocalyptic number.

It is an amenable number.

19961413 is a deficient number, since it is larger than the sum of its proper divisors (1).

19961413 is an equidigital number, since it uses as much as digits as its factorization.

19961413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 34.

The square root of 19961413 is about 4467.8197143573. The cubic root of 19961413 is about 271.2670805500.

The spelling of 19961413 in words is "nineteen million, nine hundred sixty-one thousand, four hundred thirteen".