291313 has 8 divisors (see below), whose sum is σ = 323136. Its totient is φ = 260400.

The previous prime is 291299. The next prime is 291331. The reversal of 291313 is 313192.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 291313 - 2¹³ = 283121 is a prime.

291313 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (291373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 595 + ... + 967.

It is an arithmetic number, because the mean of its divisors is an integer number (40392).

2²⁹¹³¹³ is an apocalyptic number.

291313 is the 289-th centered heptagonal number.

It is an amenable number.

291313 is a deficient number, since it is larger than the sum of its proper divisors (31823).

291313 is a wasteful number, since it uses less digits than its factorization.

291313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455.

The product of its digits is 162, while the sum is 19.

The square root of 291313 is about 539.7341938399. The cubic root of 291313 is about 66.2908043395.

It can be divided in two parts, 2913 and 13, that added together give a triangular number (2926 = T₇₆).

The spelling of 291313 in words is "two hundred ninety-one thousand, three hundred thirteen".