291413321 has 2 divisors, whose sum is σ = 291413322. Its totient is φ = 291413320.

The previous prime is 291413233. The next prime is 291413341. The reversal of 291413321 is 123314192.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 276889600 + 14523721 = 16640^2 + 3811^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-291413321 is a prime.

It is not a weakly prime, because it can be changed into another prime (291413341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145706660 + 145706661.

It is an arithmetic number, because the mean of its divisors is an integer number (145706661).

Almost surely, 2^291413321 is an apocalyptic number.

It is an amenable number.

291413321 is a deficient number, since it is larger than the sum of its proper divisors (1).

291413321 is an equidigital number, since it uses as much as digits as its factorization.

291413321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 26.

The square root of 291413321 is about 17070.8324635912. The cubic root of 291413321 is about 662.9841310459.

The spelling of 291413321 in words is "two hundred ninety-one million, four hundred thirteen thousand, three hundred twenty-one".