19289961 has 8 divisors (see below), whose sum is σ = 28577760. Its totient is φ = 12859956.

The previous prime is 19289953. The next prime is 19289981. The reversal of 19289961 is 16998291.

It is not a de Polignac number, because 19289961 - 2³ = 19289953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19289911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357195 + ... + 357248.

It is an arithmetic number, because the mean of its divisors is an integer number (3572220).

Almost surely, 2^19289961 is an apocalyptic number.

It is an amenable number.

19289961 is a deficient number, since it is larger than the sum of its proper divisors (9287799).

19289961 is an equidigital number, since it uses as much as digits as its factorization.

19289961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714452 (or 714446 counting only the distinct ones).

The product of its digits is 69984, while the sum is 45.

The square root of 19289961 is about 4392.0338113453. The cubic root of 19289961 is about 268.1907428402.

The spelling of 19289961 in words is "nineteen million, two hundred eighty-nine thousand, nine hundred sixty-one".