491264737 has 2 divisors, whose sum is σ = 491264738. Its totient is φ = 491264736.

The previous prime is 491264731. The next prime is 491264743. The reversal of 491264737 is 737462194.

It is a balanced prime because it is at equal distance from previous prime (491264731) and next prime (491264743).

It can be written as a sum of positive squares in only one way, i.e., 247873536 + 243391201 = 15744^2 + 15601^2 .

It is a cyclic number.

It is not a de Polignac number, because 491264737 - 2³ = 491264729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 491264693 and 491264702.

It is not a weakly prime, because it can be changed into another prime (491264731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245632368 + 245632369.

It is an arithmetic number, because the mean of its divisors is an integer number (245632369).

Almost surely, 2^491264737 is an apocalyptic number.

It is an amenable number.

491264737 is a deficient number, since it is larger than the sum of its proper divisors (1).

491264737 is an equidigital number, since it uses as much as digits as its factorization.

491264737 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 43.

The square root of 491264737 is about 22164.4927079327. The cubic root of 491264737 is about 789.0512227911.

The spelling of 491264737 in words is "four hundred ninety-one million, two hundred sixty-four thousand, seven hundred thirty-seven".