97221393 has 6 divisors (see below), whose sum is σ = 140430914. Its totient is φ = 64814256.

The previous prime is 97221389. The next prime is 97221401. The reversal of 97221393 is 39312279.

It can be written as a sum of positive squares in only one way, i.e., 82955664 + 14265729 = 9108^2 + 3777^2 .

It is not a de Polignac number, because 97221393 - 2² = 97221389 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (97221493) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5401180 + ... + 5401197.

Almost surely, 2^97221393 is an apocalyptic number.

It is an amenable number.

97221393 is a deficient number, since it is larger than the sum of its proper divisors (43209521).

97221393 is a wasteful number, since it uses less digits than its factorization.

97221393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10802383 (or 10802380 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 97221393 is about 9860.0909225017. The cubic root of 97221393 is about 459.8193887677.

The spelling of 97221393 in words is "ninety-seven million, two hundred twenty-one thousand, three hundred ninety-three".