9972997 has 2 divisors, whose sum is σ = 9972998. Its totient is φ = 9972996.

The previous prime is 9972973. The next prime is 9973001. The reversal of 9972997 is 7992799.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9947716 + 25281 = 3154^2 + 159^2 .

It is a cyclic number.

It is not a de Polignac number, because 9972997 - 2²³ = 1584389 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9972497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4986498 + 4986499.

It is an arithmetic number, because the mean of its divisors is an integer number (4986499).

Almost surely, 2^9972997 is an apocalyptic number.

It is an amenable number.

9972997 is a deficient number, since it is larger than the sum of its proper divisors (1).

9972997 is an equidigital number, since it uses as much as digits as its factorization.

9972997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 642978, while the sum is 52.

The square root of 9972997 is about 3158.0052248215. The cubic root of 9972997 is about 215.2493735264.

The spelling of 9972997 in words is "nine million, nine hundred seventy-two thousand, nine hundred ninety-seven".