522740891 has 2 divisors, whose sum is σ = 522740892. Its totient is φ = 522740890.

The previous prime is 522740861. The next prime is 522740927. The reversal of 522740891 is 198047225.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-522740891 is a prime.

It is a Chen prime.

It is equal to p_27489035 and since 522740891 and 27489035 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (522740831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261370445 + 261370446.

It is an arithmetic number, because the mean of its divisors is an integer number (261370446).

Almost surely, 2^522740891 is an apocalyptic number.

522740891 is a deficient number, since it is larger than the sum of its proper divisors (1).

522740891 is an equidigital number, since it uses as much as digits as its factorization.

522740891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 522740891 is about 22863.5275274836. The cubic root of 522740891 is about 805.5555446613. Note that the first 4 decimals are identical.

The spelling of 522740891 in words is "five hundred twenty-two million, seven hundred forty thousand, eight hundred ninety-one".