9213979 has 2 divisors, whose sum is σ = 9213980. Its totient is φ = 9213978.

The previous prime is 9213947. The next prime is 9214001. The reversal of 9213979 is 9793129.

It is a strong prime.

It is an emirp because it is prime and its reverse (9793129) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9213979 - 2⁵ = 9213947 is a prime.

It is not a weakly prime, because it can be changed into another prime (9213079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4606989 + 4606990.

It is an arithmetic number, because the mean of its divisors is an integer number (4606990).

Almost surely, 2^9213979 is an apocalyptic number.

9213979 is a deficient number, since it is larger than the sum of its proper divisors (1).

9213979 is an equidigital number, since it uses as much as digits as its factorization.

9213979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618, while the sum is 40.

The square root of 9213979 is about 3035.4536728469. The cubic root of 9213979 is about 209.6439848424.

It can be divided in two parts, 921 and 3979, that added together give a square (4900 = 70²).

The spelling of 9213979 in words is "nine million, two hundred thirteen thousand, nine hundred seventy-nine".