1021972073 has 2 divisors, whose sum is σ = 1021972074. Its totient is φ = 1021972072.

The previous prime is 1021972001. The next prime is 1021972123. The reversal of 1021972073 is 3702791201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 812649049 + 209323024 = 28507^2 + 14468^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021972073 - 2⁸ = 1021971817 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021971073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510986036 + 510986037.

It is an arithmetic number, because the mean of its divisors is an integer number (510986037).

Almost surely, 2^1021972073 is an apocalyptic number.

It is an amenable number.

1021972073 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021972073 is an equidigital number, since it uses as much as digits as its factorization.

1021972073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 1021972073 is about 31968.2979371752. The cubic root of 1021972073 is about 1007.2710283456.

The spelling of 1021972073 in words is "one billion, twenty-one million, nine hundred seventy-two thousand, seventy-three".