19090969 has 2 divisors, whose sum is σ = 19090970. Its totient is φ = 19090968.

The previous prime is 19090963. The next prime is 19090979. The reversal of 19090969 is 96909091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15705369 + 3385600 = 3963^2 + 1840^2 .

It is an emirp because it is prime and its reverse (96909091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19090969 - 2⁵ = 19090937 is a prime.

It is a super-2 number, since 2×19090969² = 728930194717922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19090963) 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, 9545484 + 9545485.

It is an arithmetic number, because the mean of its divisors is an integer number (9545485).

Almost surely, 2^19090969 is an apocalyptic number.

It is an amenable number.

19090969 is a deficient number, since it is larger than the sum of its proper divisors (1).

19090969 is an equidigital number, since it uses as much as digits as its factorization.

19090969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39366, while the sum is 43.

The square root of 19090969 is about 4369.3213431836. The cubic root of 19090969 is about 267.2653498785.

The spelling of 19090969 in words is "nineteen million, ninety thousand, nine hundred sixty-nine".