867449491 has 2 divisors, whose sum is σ = 867449492. Its totient is φ = 867449490.

The previous prime is 867449477. The next prime is 867449521. The reversal of 867449491 is 194944768.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 867449491 - 2¹¹ = 867447443 is a prime.

It is a super-3 number, since 3×867449491³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (867449431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433724745 + 433724746.

It is an arithmetic number, because the mean of its divisors is an integer number (433724746).

Almost surely, 2^867449491 is an apocalyptic number.

867449491 is a deficient number, since it is larger than the sum of its proper divisors (1).

867449491 is an equidigital number, since it uses as much as digits as its factorization.

867449491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 52.

The square root of 867449491 is about 29452.4954969863. The cubic root of 867449491 is about 953.7064771406.

The spelling of 867449491 in words is "eight hundred sixty-seven million, four hundred forty-nine thousand, four hundred ninety-one".