291163963 has 4 divisors (see below), whose sum is σ = 291223728. Its totient is φ = 291104200.

The previous prime is 291163949. The next prime is 291163979. The reversal of 291163963 is 369361192.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-291163963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (291163933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21856 + ... + 32557.

It is an arithmetic number, because the mean of its divisors is an integer number (72805932).

Almost surely, 2^291163963 is an apocalyptic number.

291163963 is a deficient number, since it is larger than the sum of its proper divisors (59765).

291163963 is an equidigital number, since it uses as much as digits as its factorization.

291163963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59764.

The product of its digits is 52488, while the sum is 40.

The square root of 291163963 is about 17063.5272731051. The cubic root of 291163963 is about 662.7949752300.

The spelling of 291163963 in words is "two hundred ninety-one million, one hundred sixty-three thousand, nine hundred sixty-three".