291853 has 2 divisors, whose sum is σ = 291854. Its totient is φ = 291852.

The previous prime is 291833. The next prime is 291857. The reversal of 291853 is 358192.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 233289 + 58564 = 483^2 + 242^2 .

It is a cyclic number.

It is not a de Polignac number, because 291853 - 2¹⁷ = 160781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (291857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145926 + 145927.

It is an arithmetic number, because the mean of its divisors is an integer number (145927).

2²⁹¹⁸⁵³ is an apocalyptic number.

It is an amenable number.

291853 is a deficient number, since it is larger than the sum of its proper divisors (1).

291853 is an equidigital number, since it uses as much as digits as its factorization.

291853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 28.

The square root of 291853 is about 540.2342084689. The cubic root of 291853 is about 66.3317396204.

The spelling of 291853 in words is "two hundred ninety-one thousand, eight hundred fifty-three".