999456769 has 4 divisors (see below), whose sum is σ = 1006075840. Its totient is φ = 992837700.

The previous prime is 999456767. The next prime is 999456781. The reversal of 999456769 is 967654999.

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 999456769 - 2¹ = 999456767 is a prime.

It is a super-2 number, since 2×999456769² = 1997827666199838722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 999456769.

It is not an unprimeable number, because it can be changed into a prime (999456763) 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, 3309309 + ... + 3309610.

It is an arithmetic number, because the mean of its divisors is an integer number (251518960).

It is a Proth number, since it is equal to 30501 ⋅ 2¹⁵ + 1 and 30501 < 2¹⁵.

Almost surely, 2^999456769 is an apocalyptic number.

It is an amenable number.

999456769 is a deficient number, since it is larger than the sum of its proper divisors (6619071).

999456769 is a wasteful number, since it uses less digits than its factorization.

999456769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6619070.

The product of its digits is 33067440, while the sum is 64.

The square root of 999456769 is about 31614.1861986039. The cubic root of 999456769 is about 999.8188902012.

The spelling of 999456769 in words is "nine hundred ninety-nine million, four hundred fifty-six thousand, seven hundred sixty-nine".