999497 has 4 divisors (see below), whose sum is σ = 1002000. Its totient is φ = 996996.

The previous prime is 999491. The next prime is 999499. The reversal of 999497 is 794999.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 999497 - 2⁶ = 999433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503 + ... + 1500.

It is an arithmetic number, because the mean of its divisors is an integer number (250500).

2⁹⁹⁹⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

999497 is a deficient number, since it is larger than the sum of its proper divisors (2503).

999497 is a wasteful number, since it uses less digits than its factorization.

999497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2502.

The product of its digits is 183708, while the sum is 47.

The square root of 999497 is about 999.7484683659. The cubic root of 999497 is about 99.9832305213.

The spelling of 999497 in words is "nine hundred ninety-nine thousand, four hundred ninety-seven".