19401799 has 2 divisors, whose sum is σ = 19401800. Its totient is φ = 19401798.

The previous prime is 19401769. The next prime is 19401827. The reversal of 19401799 is 99710491.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19401799 - 2⁹ = 19401287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19401769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9700899 + 9700900.

It is an arithmetic number, because the mean of its divisors is an integer number (9700900).

Almost surely, 2^19401799 is an apocalyptic number.

19401799 is a deficient number, since it is larger than the sum of its proper divisors (1).

19401799 is an equidigital number, since it uses as much as digits as its factorization.

19401799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 40.

The square root of 19401799 is about 4404.7473253298. The cubic root of 19401799 is about 268.7080436395.

The spelling of 19401799 in words is "nineteen million, four hundred one thousand, seven hundred ninety-nine".