97281647 has 2 divisors, whose sum is σ = 97281648. Its totient is φ = 97281646.

The previous prime is 97281637. The next prime is 97281673. The reversal of 97281647 is 74618279.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97281647 - 2²⁶ = 30172783 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 97281598 and 97281607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97281637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48640823 + 48640824.

It is an arithmetic number, because the mean of its divisors is an integer number (48640824).

Almost surely, 2^97281647 is an apocalyptic number.

97281647 is a deficient number, since it is larger than the sum of its proper divisors (1).

97281647 is an equidigital number, since it uses as much as digits as its factorization.

97281647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 44.

The square root of 97281647 is about 9863.1458977347. The cubic root of 97281647 is about 459.9143618145.

The spelling of 97281647 in words is "ninety-seven million, two hundred eighty-one thousand, six hundred forty-seven".