97629281 has 2 divisors, whose sum is σ = 97629282. Its totient is φ = 97629280.

The previous prime is 97629269. The next prime is 97629373. The reversal of 97629281 is 18292679.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58140625 + 39488656 = 7625^2 + 6284^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97629281 is a prime.

It is a super-2 number, since 2×97629281² = 19062953017153922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (97629781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48814640 + 48814641.

It is an arithmetic number, because the mean of its divisors is an integer number (48814641).

Almost surely, 2^97629281 is an apocalyptic number.

It is an amenable number.

97629281 is a deficient number, since it is larger than the sum of its proper divisors (1).

97629281 is an equidigital number, since it uses as much as digits as its factorization.

97629281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 44.

The square root of 97629281 is about 9880.7530583453. The cubic root of 97629281 is about 460.4615421117.

The spelling of 97629281 in words is "ninety-seven million, six hundred twenty-nine thousand, two hundred eighty-one".