974513661 has 16 divisors (see below), whose sum is σ = 1500856128. Its totient is φ = 555872000.

The previous prime is 974513653. The next prime is 974513663. The reversal of 974513661 is 166315479.

It is a cyclic number.

It is not a de Polignac number, because 974513661 - 2³ = 974513653 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (974513663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 867990 + ... + 869111.

It is an arithmetic number, because the mean of its divisors is an integer number (93803508).

Almost surely, 2^974513661 is an apocalyptic number.

It is an amenable number.

974513661 is a deficient number, since it is larger than the sum of its proper divisors (526342467).

974513661 is a wasteful number, since it uses less digits than its factorization.

974513661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1737132.

The product of its digits is 136080, while the sum is 42.

The square root of 974513661 is about 31217.2013639916. The cubic root of 974513661 is about 991.4313414667.

The spelling of 974513661 in words is "nine hundred seventy-four million, five hundred thirteen thousand, six hundred sixty-one".