16972447 has 4 divisors (see below), whose sum is σ = 17131176. Its totient is φ = 16813720.

The previous prime is 16972429. The next prime is 16972463. The reversal of 16972447 is 74427961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74427961 = 277 ⋅268693.

It is a cyclic number.

It is not a de Polignac number, because 16972447 - 2¹¹ = 16970399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16972247) 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, 79204 + ... + 79417.

It is an arithmetic number, because the mean of its divisors is an integer number (4282794).

Almost surely, 2^16972447 is an apocalyptic number.

16972447 is a deficient number, since it is larger than the sum of its proper divisors (158729).

16972447 is a wasteful number, since it uses less digits than its factorization.

16972447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158728.

The product of its digits is 84672, while the sum is 40.

The square root of 16972447 is about 4119.7629786190. The cubic root of 16972447 is about 256.9891692004.

The spelling of 16972447 in words is "sixteen million, nine hundred seventy-two thousand, four hundred forty-seven".