19190869 has 2 divisors, whose sum is σ = 19190870. Its totient is φ = 19190868.

The previous prime is 19190861. The next prime is 19190879. The reversal of 19190869 is 96809191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18404100 + 786769 = 4290^2 + 887^2 .

It is a cyclic number.

It is not a de Polignac number, because 19190869 - 2³ = 19190861 is a prime.

It is a super-2 number, since 2×19190869² = 736578905950322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19190861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9595434 + 9595435.

It is an arithmetic number, because the mean of its divisors is an integer number (9595435).

Almost surely, 2^19190869 is an apocalyptic number.

It is an amenable number.

19190869 is a deficient number, since it is larger than the sum of its proper divisors (1).

19190869 is an equidigital number, since it uses as much as digits as its factorization.

19190869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 43.

The square root of 19190869 is about 4380.7384080769. The cubic root of 19190869 is about 267.7307247446.

The spelling of 19190869 in words is "nineteen million, one hundred ninety thousand, eight hundred sixty-nine".