972800923 has 2 divisors, whose sum is σ = 972800924. Its totient is φ = 972800922.

The previous prime is 972800921. The next prime is 972800947. The reversal of 972800923 is 329008279.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 972800923 - 2¹ = 972800921 is a prime.

Together with 972800921, it forms a pair of twin primes.

It is equal to p_49534168 and since 972800923 and 49534168 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (972800921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486400461 + 486400462.

It is an arithmetic number, because the mean of its divisors is an integer number (486400462).

Almost surely, 2^972800923 is an apocalyptic number.

972800923 is a deficient number, since it is larger than the sum of its proper divisors (1).

972800923 is an equidigital number, since it uses as much as digits as its factorization.

972800923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 972800923 is about 31189.7566999167. The cubic root of 972800923 is about 990.8501770793.

The spelling of 972800923 in words is "nine hundred seventy-two million, eight hundred thousand, nine hundred twenty-three".