19416961 has 2 divisors, whose sum is σ = 19416962. Its totient is φ = 19416960.

The previous prime is 19416953. The next prime is 19416967. The reversal of 19416961 is 16961491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18974736 + 442225 = 4356^2 + 665^2 .

It is a cyclic number.

It is not a de Polignac number, because 19416961 - 2³ = 19416953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19416961.

It is not a weakly prime, because it can be changed into another prime (19416967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9708480 + 9708481.

It is an arithmetic number, because the mean of its divisors is an integer number (9708481).

Almost surely, 2^19416961 is an apocalyptic number.

It is an amenable number.

19416961 is a deficient number, since it is larger than the sum of its proper divisors (1).

19416961 is an equidigital number, since it uses as much as digits as its factorization.

19416961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 37.

The square root of 19416961 is about 4406.4680868015. The cubic root of 19416961 is about 268.7780215238.

The spelling of 19416961 in words is "nineteen million, four hundred sixteen thousand, nine hundred sixty-one".