291013 has 2 divisors, whose sum is σ = 291014. Its totient is φ = 291012.

The previous prime is 291007. The next prime is 291037. The reversal of 291013 is 310192.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199809 + 91204 = 447^2 + 302^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-291013 is a prime.

291013 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (291043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145506 + 145507.

It is an arithmetic number, because the mean of its divisors is an integer number (145507).

2²⁹¹⁰¹³ is an apocalyptic number.

It is an amenable number.

291013 is a deficient number, since it is larger than the sum of its proper divisors (1).

291013 is an equidigital number, since it uses as much as digits as its factorization.

291013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 291013 is about 539.4562076758. The cubic root of 291013 is about 66.2680406547.

The spelling of 291013 in words is "two hundred ninety-one thousand, thirteen".