974001681 has 27 divisors (see below), whose sum is σ = 1434888507. Its totient is φ = 636663600.

The previous prime is 974001673. The next prime is 974001683. The reversal of 974001681 is 186100479.

The square root of 974001681 is 31209.

It is a perfect power (a square), and thus also a powerful number.

974001681 is a `hidden beast` number, since 97 + 400 + 168 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 935809281 + 38192400 = 30591^2 + 6180^2 .

It is not a de Polignac number, because 974001681 - 2³ = 974001673 is a prime.

It is a super-2 number, since 2×974001681² = 1897358549181651522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (974001683) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 9456276 + ... + 9456378.

Almost surely, 2^974001681 is an apocalyptic number.

974001681 is the 31209-th square number.

974001681 is the 15605-th centered octagonal number.

It is an amenable number.

974001681 is a deficient number, since it is larger than the sum of its proper divisors (460886826).

974001681 is a wasteful number, since it uses less digits than its factorization.

974001681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The cubic root of 974001681 is about 991.2576883733.

Multiplying 974001681 by its sum of digits (36), we get a square (35064060516 = 187254²).

The spelling of 974001681 in words is "nine hundred seventy-four million, one thousand, six hundred eighty-one".