974551647 has 16 divisors (see below), whose sum is σ = 1305690848. Its totient is φ = 646565760.

The previous prime is 974551637. The next prime is 974551661. The reversal of 974551647 is 746155479.

It is not a de Polignac number, because 974551647 - 2⁷ = 974551519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 974551596 and 974551605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (974551637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 953997 + ... + 955017.

It is an arithmetic number, because the mean of its divisors is an integer number (81605678).

Almost surely, 2^974551647 is an apocalyptic number.

974551647 is a deficient number, since it is larger than the sum of its proper divisors (331139201).

974551647 is a wasteful number, since it uses less digits than its factorization.

974551647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2250.

The product of its digits is 1058400, while the sum is 48.

The square root of 974551647 is about 31217.8097726282. The cubic root of 974551647 is about 991.4442231132. Note that the first 3 decimals are identical.

The spelling of 974551647 in words is "nine hundred seventy-four million, five hundred fifty-one thousand, six hundred forty-seven".