899491 has 2 divisors, whose sum is σ = 899492. Its totient is φ = 899490.

The previous prime is 899477. The next prime is 899519. The reversal of 899491 is 194998.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 899491 - 2¹¹ = 897443 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (899401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449745 + 449746.

It is an arithmetic number, because the mean of its divisors is an integer number (449746).

2⁸⁹⁹⁴⁹¹ is an apocalyptic number.

899491 is a deficient number, since it is larger than the sum of its proper divisors (1).

899491 is an equidigital number, since it uses as much as digits as its factorization.

899491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 40.

The square root of 899491 is about 948.4149935550. The cubic root of 899491 is about 96.5307337654.

It can be divided in two parts, 8 and 99491, that added together give a palindrome (99499).

The spelling of 899491 in words is "eight hundred ninety-nine thousand, four hundred ninety-one".