999999455 has 32 divisors (see below), whose sum is σ = 1499011584. Its totient is φ = 623500416.

The previous prime is 999999433. The next prime is 999999487. The reversal of 999999455 is 554999999.

It is not a de Polignac number, because 999999455 - 2⁶ = 999999391 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14084 + ... + 46886.

It is an arithmetic number, because the mean of its divisors is an integer number (46844112).

Almost surely, 2^999999455 is an apocalyptic number.

999999455 is a deficient number, since it is larger than the sum of its proper divisors (499012129).

999999455 is a wasteful number, since it uses less digits than its factorization.

999999455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32895.

The product of its digits is 53144100, while the sum is 68.

The square root of 999999455 is about 31622.7679844760. The cubic root of 999999455 is about 999.9998183333. Note that the first 3 decimals are identical.

The spelling of 999999455 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, four hundred fifty-five".