322790381 has 2 divisors, whose sum is σ = 322790382. Its totient is φ = 322790380.

The previous prime is 322790359. The next prime is 322790399. The reversal of 322790381 is 183097223.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 322777156 + 13225 = 17966^2 + 115^2 .

It is a cyclic number.

It is not a de Polignac number, because 322790381 - 2¹⁸ = 322528237 is a prime.

It is a super-2 number, since 2×322790381² = 208387260132250322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (322790341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161395190 + 161395191.

It is an arithmetic number, because the mean of its divisors is an integer number (161395191).

Almost surely, 2^322790381 is an apocalyptic number.

It is an amenable number.

322790381 is a deficient number, since it is larger than the sum of its proper divisors (1).

322790381 is an equidigital number, since it uses as much as digits as its factorization.

322790381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 322790381 is about 17966.3680525586. The cubic root of 322790381 is about 685.9727462419.

The spelling of 322790381 in words is "three hundred twenty-two million, seven hundred ninety thousand, three hundred eighty-one".