13561963 has 2 divisors, whose sum is σ = 13561964. Its totient is φ = 13561962.

The previous prime is 13561931. The next prime is 13561967. The reversal of 13561963 is 36916531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13561963 - 2⁵ = 13561931 is a prime.

It is not a weakly prime, because it can be changed into another prime (13561967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6780981 + 6780982.

It is an arithmetic number, because the mean of its divisors is an integer number (6780982).

Almost surely, 2^13561963 is an apocalyptic number.

13561963 is a deficient number, since it is larger than the sum of its proper divisors (1).

13561963 is an equidigital number, since it uses as much as digits as its factorization.

13561963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14580, while the sum is 34.

The square root of 13561963 is about 3682.6570570717. The cubic root of 13561963 is about 238.4738986389.

The spelling of 13561963 in words is "thirteen million, five hundred sixty-one thousand, nine hundred sixty-three".