97428229 has 2 divisors, whose sum is σ = 97428230. Its totient is φ = 97428228.

The previous prime is 97428223. The next prime is 97428263. The reversal of 97428229 is 92282479.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63520900 + 33907329 = 7970^2 + 5823^2 .

It is a cyclic number.

It is not a de Polignac number, because 97428229 - 2⁹ = 97427717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97428223) 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, 48714114 + 48714115.

It is an arithmetic number, because the mean of its divisors is an integer number (48714115).

Almost surely, 2^97428229 is an apocalyptic number.

It is an amenable number.

97428229 is a deficient number, since it is larger than the sum of its proper divisors (1).

97428229 is an equidigital number, since it uses as much as digits as its factorization.

97428229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 43.

The square root of 97428229 is about 9870.5738941563. The cubic root of 97428229 is about 460.1452424155.

It can be divided in two parts, 9742 and 8229, that added together give a palindrome (17971).

The spelling of 97428229 in words is "ninety-seven million, four hundred twenty-eight thousand, two hundred twenty-nine".