19892097 has 6 divisors (see below), whose sum is σ = 28733042. Its totient is φ = 13261392.

The previous prime is 19892083. The next prime is 19892113. The reversal of 19892097 is 79029891.

It can be written as a sum of positive squares in only one way, i.e., 16353936 + 3538161 = 4044^2 + 1881^2 .

It is not a de Polignac number, because 19892097 - 2¹⁰ = 19891073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19892017) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1105108 + ... + 1105125.

Almost surely, 2^19892097 is an apocalyptic number.

It is an amenable number.

19892097 is a deficient number, since it is larger than the sum of its proper divisors (8840945).

19892097 is a wasteful number, since it uses less digits than its factorization.

19892097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2210239 (or 2210236 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 19892097 is about 4460.0557171408. The cubic root of 19892097 is about 270.9527247863.

The spelling of 19892097 in words is "nineteen million, eight hundred ninety-two thousand, ninety-seven".