19097649 has 12 divisors (see below), whose sum is σ = 28106676. Its totient is φ = 12491232.

The previous prime is 19097609. The next prime is 19097657. The reversal of 19097649 is 94679091.

It can be written as a sum of positive squares in 2 ways, for example, as 14288400 + 4809249 = 3780^2 + 2193^2 .

It is a de Polignac number, because none of the positive numbers 2^k-19097649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19097609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19542 + ... + 20495.

It is an arithmetic number, because the mean of its divisors is an integer number (2342223).

Almost surely, 2^19097649 is an apocalyptic number.

It is an amenable number.

19097649 is a deficient number, since it is larger than the sum of its proper divisors (9009027).

19097649 is a wasteful number, since it uses less digits than its factorization.

19097649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40096 (or 40093 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 19097649 is about 4370.0856971002. The cubic root of 19097649 is about 267.2965186185.

The spelling of 19097649 in words is "nineteen million, ninety-seven thousand, six hundred forty-nine".