97213385 has 4 divisors (see below), whose sum is σ = 116656068. Its totient is φ = 77770704.

The previous prime is 97213381. The next prime is 97213421. The reversal of 97213385 is 58331279.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41576704 + 55636681 = 6448^2 + 7459^2 .

It is a cyclic number.

It is not a de Polignac number, because 97213385 - 2² = 97213381 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97213381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9721334 + ... + 9721343.

It is an arithmetic number, because the mean of its divisors is an integer number (29164017).

Almost surely, 2^97213385 is an apocalyptic number.

It is an amenable number.

97213385 is a deficient number, since it is larger than the sum of its proper divisors (19442683).

97213385 is a wasteful number, since it uses less digits than its factorization.

97213385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19442682.

The product of its digits is 45360, while the sum is 38.

The square root of 97213385 is about 9859.6848326912. The cubic root of 97213385 is about 459.8067635122.

The spelling of 97213385 in words is "ninety-seven million, two hundred thirteen thousand, three hundred eighty-five".