491397367 has 2 divisors, whose sum is σ = 491397368. Its totient is φ = 491397366.

The previous prime is 491397343. The next prime is 491397409. The reversal of 491397367 is 763793194.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 491397367 - 2²³ = 483008759 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 491397367.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491397317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245698683 + 245698684.

It is an arithmetic number, because the mean of its divisors is an integer number (245698684).

Almost surely, 2^491397367 is an apocalyptic number.

491397367 is a deficient number, since it is larger than the sum of its proper divisors (1).

491397367 is an equidigital number, since it uses as much as digits as its factorization.

491397367 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 857304, while the sum is 49.

The square root of 491397367 is about 22167.4844535865. The cubic root of 491397367 is about 789.1222248662.

The spelling of 491397367 in words is "four hundred ninety-one million, three hundred ninety-seven thousand, three hundred sixty-seven".