97749647 has 2 divisors, whose sum is σ = 97749648. Its totient is φ = 97749646.

The previous prime is 97749629. The next prime is 97749653. The reversal of 97749647 is 74694779.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97749647 - 2¹² = 97745551 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97749667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48874823 + 48874824.

It is an arithmetic number, because the mean of its divisors is an integer number (48874824).

Almost surely, 2^97749647 is an apocalyptic number.

97749647 is a deficient number, since it is larger than the sum of its proper divisors (1).

97749647 is an equidigital number, since it uses as much as digits as its factorization.

97749647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2667168, while the sum is 53.

The square root of 97749647 is about 9886.8421146491. The cubic root of 97749647 is about 460.6506969494.

The spelling of 97749647 in words is "ninety-seven million, seven hundred forty-nine thousand, six hundred forty-seven".