19799469 has 6 divisors (see below), whose sum is σ = 28599246. Its totient is φ = 13199640.

The previous prime is 19799467. The next prime is 19799491. The reversal of 19799469 is 96499791.

19799469 is a `hidden beast` number, since 1 + 97 + 99 + 469 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19474569 + 324900 = 4413^2 + 570^2 .

It is not a de Polignac number, because 19799469 - 2¹ = 19799467 is a prime.

It is a super-2 number, since 2×19799469² = 784037945363922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19799467) 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, 1099962 + ... + 1099979.

It is an arithmetic number, because the mean of its divisors is an integer number (4766541).

Almost surely, 2^19799469 is an apocalyptic number.

It is an amenable number.

19799469 is a deficient number, since it is larger than the sum of its proper divisors (8799777).

19799469 is a wasteful number, since it uses less digits than its factorization.

19799469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2199947 (or 2199944 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The square root of 19799469 is about 4449.6594251695. The cubic root of 19799469 is about 270.5315044686.

The spelling of 19799469 in words is "nineteen million, seven hundred ninety-nine thousand, four hundred sixty-nine".