972002921 has 2 divisors, whose sum is σ = 972002922. Its totient is φ = 972002920.

The previous prime is 972002879. The next prime is 972002929. The reversal of 972002921 is 129200279.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 631969321 + 340033600 = 25139^2 + 18440^2 .

It is a cyclic number.

It is not a de Polignac number, because 972002921 - 2²² = 967808617 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (972002929) 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 as a sum of consecutive naturals, namely, 486001460 + 486001461.

It is an arithmetic number, because the mean of its divisors is an integer number (486001461).

Almost surely, 2^972002921 is an apocalyptic number.

It is an amenable number.

972002921 is a deficient number, since it is larger than the sum of its proper divisors (1).

972002921 is an equidigital number, since it uses as much as digits as its factorization.

972002921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 972002921 is about 31176.9613817639. The cubic root of 972002921 is about 990.5791669441.

The spelling of 972002921 in words is "nine hundred seventy-two million, two thousand, nine hundred twenty-one".