19949297 has 4 divisors (see below), whose sum is σ = 20999280. Its totient is φ = 18899316.

The previous prime is 19949273. The next prime is 19949333. The reversal of 19949297 is 79294991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19949297 - 2⁶ = 19949233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19949207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 524963 + ... + 525000.

It is an arithmetic number, because the mean of its divisors is an integer number (5249820).

Almost surely, 2^19949297 is an apocalyptic number.

It is an amenable number.

19949297 is a deficient number, since it is larger than the sum of its proper divisors (1049983).

19949297 is a wasteful number, since it uses less digits than its factorization.

19949297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049982.

The product of its digits is 367416, while the sum is 50.

The square root of 19949297 is about 4466.4635899109. The cubic root of 19949297 is about 271.2121856862.

The spelling of 19949297 in words is "nineteen million, nine hundred forty-nine thousand, two hundred ninety-seven".