9972691 has 2 divisors, whose sum is σ = 9972692. Its totient is φ = 9972690.

The previous prime is 9972679. The next prime is 9972713. The reversal of 9972691 is 1962799.

9972691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9972691 - 2¹⁷ = 9841619 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (9972631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4986345 + 4986346.

It is an arithmetic number, because the mean of its divisors is an integer number (4986346).

Almost surely, 2^9972691 is an apocalyptic number.

9972691 is a deficient number, since it is larger than the sum of its proper divisors (1).

9972691 is an equidigital number, since it uses as much as digits as its factorization.

9972691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61236, while the sum is 43.

The square root of 9972691 is about 3157.9567761450. The cubic root of 9972691 is about 215.2471720156.

The spelling of 9972691 in words is "nine million, nine hundred seventy-two thousand, six hundred ninety-one".