97213111 has 4 divisors (see below), whose sum is σ = 101439792. Its totient is φ = 92986432.

The previous prime is 97213093. The next prime is 97213159. The reversal of 97213111 is 11131279.

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

It is a cyclic number.

It is not a de Polignac number, because 97213111 - 2²³ = 88824503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97213211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2113306 + ... + 2113351.

It is an arithmetic number, because the mean of its divisors is an integer number (25359948).

Almost surely, 2^97213111 is an apocalyptic number.

97213111 is a deficient number, since it is larger than the sum of its proper divisors (4226681).

97213111 is a wasteful number, since it uses less digits than its factorization.

97213111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4226680.

The product of its digits is 378, while the sum is 25.

The square root of 97213111 is about 9859.6709377139. The cubic root of 97213111 is about 459.8063315169.

The spelling of 97213111 in words is "ninety-seven million, two hundred thirteen thousand, one hundred eleven".