973606021 has 2 divisors, whose sum is σ = 973606022. Its totient is φ = 973606020.

The previous prime is 973605979. The next prime is 973606087. The reversal of 973606021 is 120606379.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 548215396 + 425390625 = 23414^2 + 20625^2 .

It is a cyclic number.

It is not a de Polignac number, because 973606021 - 2¹⁷ = 973474949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (973606091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486803010 + 486803011.

It is an arithmetic number, because the mean of its divisors is an integer number (486803011).

Almost surely, 2^973606021 is an apocalyptic number.

It is an amenable number.

973606021 is a deficient number, since it is larger than the sum of its proper divisors (1).

973606021 is an equidigital number, since it uses as much as digits as its factorization.

973606021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 973606021 is about 31202.6604795168. The cubic root of 973606021 is about 991.1234469432.

The spelling of 973606021 in words is "nine hundred seventy-three million, six hundred six thousand, twenty-one".