973921861 has 6 divisors (see below), whose sum is σ = 1070509286. Its totient is φ = 885383400.

The previous prime is 973921841. The next prime is 973921943. The reversal of 973921861 is 168129379.

It is a happy number.

973921861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 590976100 + 382945761 = 24310^2 + 19569^2 .

It is not a de Polignac number, because 973921861 - 2⁵ = 973921829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (973921841) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4024350 + ... + 4024591.

Almost surely, 2^973921861 is an apocalyptic number.

It is an amenable number.

973921861 is a deficient number, since it is larger than the sum of its proper divisors (96587425).

973921861 is a wasteful number, since it uses less digits than its factorization.

973921861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8048963 (or 8048952 counting only the distinct ones).

The product of its digits is 163296, while the sum is 46.

The square root of 973921861 is about 31207.7211760167. The cubic root of 973921861 is about 991.2306095869.

The spelling of 973921861 in words is "nine hundred seventy-three million, nine hundred twenty-one thousand, eight hundred sixty-one".