97021213 has 2 divisors, whose sum is σ = 97021214. Its totient is φ = 97021212.

The previous prime is 97021181. The next prime is 97021219. The reversal of 97021213 is 31212079.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89908324 + 7112889 = 9482^2 + 2667^2 .

It is a cyclic number.

It is not a de Polignac number, because 97021213 - 2⁵ = 97021181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97021219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48510606 + 48510607.

It is an arithmetic number, because the mean of its divisors is an integer number (48510607).

Almost surely, 2^97021213 is an apocalyptic number.

It is an amenable number.

97021213 is a deficient number, since it is larger than the sum of its proper divisors (1).

97021213 is an equidigital number, since it uses as much as digits as its factorization.

97021213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 97021213 is about 9849.9346698341. The cubic root of 97021213 is about 459.5035807279.

It can be divided in two parts, 970212 and 13, that added together give a square (970225 = 985²).

The spelling of 97021213 in words is "ninety-seven million, twenty-one thousand, two hundred thirteen".