97002721 has 2 divisors, whose sum is σ = 97002722. Its totient is φ = 97002720.

The previous prime is 97002683. The next prime is 97002739. The reversal of 97002721 is 12720079.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69555600 + 27447121 = 8340^2 + 5239^2 .

It is a cyclic number.

It is not a de Polignac number, because 97002721 - 2¹⁹ = 96478433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97002721.

It is not a weakly prime, because it can be changed into another prime (97002781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48501360 + 48501361.

It is an arithmetic number, because the mean of its divisors is an integer number (48501361).

Almost surely, 2^97002721 is an apocalyptic number.

It is an amenable number.

97002721 is a deficient number, since it is larger than the sum of its proper divisors (1).

97002721 is an equidigital number, since it uses as much as digits as its factorization.

97002721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 97002721 is about 9848.9959386731. The cubic root of 97002721 is about 459.4743854627.

It can be divided in two parts, 9700 and 2721, that added together give a palindrome (12421).

The spelling of 97002721 in words is "ninety-seven million, two thousand, seven hundred twenty-one".