72323213 has 2 divisors, whose sum is σ = 72323214. Its totient is φ = 72323212.

The previous prime is 72323179. The next prime is 72323249. The reversal of 72323213 is 31232327.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67601284 + 4721929 = 8222^2 + 2173^2 .

It is a cyclic number.

It is not a de Polignac number, because 72323213 - 2¹⁶ = 72257677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72323113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36161606 + 36161607.

It is an arithmetic number, because the mean of its divisors is an integer number (36161607).

Almost surely, 2^72323213 is an apocalyptic number.

It is an amenable number.

72323213 is a deficient number, since it is larger than the sum of its proper divisors (1).

72323213 is an equidigital number, since it uses as much as digits as its factorization.

72323213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 23.

The square root of 72323213 is about 8504.3055565990. The cubic root of 72323213 is about 416.6383448127.

The spelling of 72323213 in words is "seventy-two million, three hundred twenty-three thousand, two hundred thirteen".