972055026821 has 2 divisors, whose sum is σ = 972055026822. Its totient is φ = 972055026820.

The previous prime is 972055026793. The next prime is 972055026827. The reversal of 972055026821 is 128620550279.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 777948696196 + 194106330625 = 882014^2 + 440575^2 .

It is a cyclic number.

It is not a de Polignac number, because 972055026821 - 2¹⁰ = 972055025797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (972055026827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486027513410 + 486027513411.

It is an arithmetic number, because the mean of its divisors is an integer number (486027513411).

Almost surely, 2^972055026821 is an apocalyptic number.

It is an amenable number.

972055026821 is a deficient number, since it is larger than the sum of its proper divisors (1).

972055026821 is an equidigital number, since it uses as much as digits as its factorization.

972055026821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 604800, while the sum is 47.

The spelling of 972055026821 in words is "nine hundred seventy-two billion, fifty-five million, twenty-six thousand, eight hundred twenty-one".