97256389 has 2 divisors, whose sum is σ = 97256390. Its totient is φ = 97256388.

The previous prime is 97256381. The next prime is 97256399. The reversal of 97256389 is 98365279.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78464164 + 18792225 = 8858^2 + 4335^2 .

It is an emirp because it is prime and its reverse (98365279) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97256389 - 2³ = 97256381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97256381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48628194 + 48628195.

It is an arithmetic number, because the mean of its divisors is an integer number (48628195).

Almost surely, 2^97256389 is an apocalyptic number.

It is an amenable number.

97256389 is a deficient number, since it is larger than the sum of its proper divisors (1).

97256389 is an equidigital number, since it uses as much as digits as its factorization.

97256389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 49.

The square root of 97256389 is about 9861.8653914967. The cubic root of 97256389 is about 459.8745546401.

The spelling of 97256389 in words is "ninety-seven million, two hundred fifty-six thousand, three hundred eighty-nine".