19363961 has 2 divisors, whose sum is σ = 19363962. Its totient is φ = 19363960.

The previous prime is 19363943. The next prime is 19363963. The reversal of 19363961 is 16936391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14440000 + 4923961 = 3800^2 + 2219^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19363961 is a prime.

Together with 19363963, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19363963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9681980 + 9681981.

It is an arithmetic number, because the mean of its divisors is an integer number (9681981).

Almost surely, 2^19363961 is an apocalyptic number.

It is an amenable number.

19363961 is a deficient number, since it is larger than the sum of its proper divisors (1).

19363961 is an equidigital number, since it uses as much as digits as its factorization.

19363961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26244, while the sum is 38.

The square root of 19363961 is about 4400.4500906157. The cubic root of 19363961 is about 268.5332489946.

The spelling of 19363961 in words is "nineteen million, three hundred sixty-three thousand, nine hundred sixty-one".