19190889 has 6 divisors (see below), whose sum is σ = 27720186. Its totient is φ = 12793920.

The previous prime is 19190879. The next prime is 19190921. The reversal of 19190889 is 98809191.

It can be written as a sum of positive squares in only one way, i.e., 18558864 + 632025 = 4308^2 + 795^2 .

It is not a de Polignac number, because 19190889 - 2⁷ = 19190761 is a prime.

It is a super-2 number, since 2×19190889² = 736580441220642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19190819) 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 in 5 ways as a sum of consecutive naturals, for example, 1066152 + ... + 1066169.

It is an arithmetic number, because the mean of its divisors is an integer number (4620031).

Almost surely, 2^19190889 is an apocalyptic number.

It is an amenable number.

19190889 is a deficient number, since it is larger than the sum of its proper divisors (8529297).

19190889 is a wasteful number, since it uses less digits than its factorization.

19190889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132327 (or 2132324 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 45.

The square root of 19190889 is about 4380.7406907965. The cubic root of 19190889 is about 267.7308177508.

The spelling of 19190889 in words is "nineteen million, one hundred ninety thousand, eight hundred eighty-nine".