291014389 has 2 divisors, whose sum is σ = 291014390. Its totient is φ = 291014388.

The previous prime is 291014387. The next prime is 291014407. The reversal of 291014389 is 983410192.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 288422289 + 2592100 = 16983^2 + 1610^2 .

It is a cyclic number.

It is not a de Polignac number, because 291014389 - 2¹ = 291014387 is a prime.

Together with 291014387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (291014387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145507194 + 145507195.

It is an arithmetic number, because the mean of its divisors is an integer number (145507195).

Almost surely, 2^291014389 is an apocalyptic number.

It is an amenable number.

291014389 is a deficient number, since it is larger than the sum of its proper divisors (1).

291014389 is an equidigital number, since it uses as much as digits as its factorization.

291014389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 291014389 is about 17059.1438530777. The cubic root of 291014389 is about 662.6814608659.

The spelling of 291014389 in words is "two hundred ninety-one million, fourteen thousand, three hundred eighty-nine".