999493801 has 4 divisors (see below), whose sum is σ = 1058287572. Its totient is φ = 940700032.

The previous prime is 999493783. The next prime is 999493829. The reversal of 999493801 is 108394999.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 519840000 + 479653801 = 22800^2 + 21901^2 .

It is not a de Polignac number, because 999493801 - 2⁷ = 999493673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999497801) 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, 29396860 + ... + 29396893.

It is an arithmetic number, because the mean of its divisors is an integer number (264571893).

Almost surely, 2^999493801 is an apocalyptic number.

It is an amenable number.

999493801 is a deficient number, since it is larger than the sum of its proper divisors (58793771).

999493801 is a wasteful number, since it uses less digits than its factorization.

999493801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58793770.

The product of its (nonzero) digits is 629856, while the sum is 52.

The square root of 999493801 is about 31614.7718796135. The cubic root of 999493801 is about 999.8312385212.

The spelling of 999493801 in words is "nine hundred ninety-nine million, four hundred ninety-three thousand, eight hundred one".