999999953 has 16 divisors (see below), whose sum is σ = 1069977600. Its totient is φ = 932514240.

The previous prime is 999999937. The next prime is 1000000007. The reversal of 999999953 is 359999999.

It is a cyclic number.

It is not a de Polignac number, because 999999953 - 2⁴ = 999999937 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (999999353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 694208 + ... + 695646.

It is an arithmetic number, because the mean of its divisors is an integer number (66873600).

Almost surely, 2^999999953 is an apocalyptic number.

It is an amenable number.

999999953 is a deficient number, since it is larger than the sum of its proper divisors (69977647).

999999953 is a wasteful number, since it uses less digits than its factorization.

999999953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272.

The product of its digits is 71744535, while the sum is 71.

The square root of 999999953 is about 31622.7758585485. The cubic root of 999999953 is about 999.9999843333. Note that the first 4 decimals are identical.

The spelling of 999999953 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred fifty-three".