973721061 has 16 divisors (see below), whose sum is σ = 1453084800. Its totient is φ = 644406624.

The previous prime is 973721059. The next prime is 973721069. The reversal of 973721061 is 160127379.

It is a happy number.

It is not a de Polignac number, because 973721061 - 2¹ = 973721059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (973721069) 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, 127921 + ... + 135318.

It is an arithmetic number, because the mean of its divisors is an integer number (90817800).

Almost surely, 2^973721061 is an apocalyptic number.

It is an amenable number.

973721061 is a deficient number, since it is larger than the sum of its proper divisors (479363739).

973721061 is a wasteful number, since it uses less digits than its factorization.

973721061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263385 (or 263379 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 973721061 is about 31204.5038576165. The cubic root of 973721061 is about 991.1624820177.

The spelling of 973721061 in words is "nine hundred seventy-three million, seven hundred twenty-one thousand, sixty-one".