999997254 has 24 divisors (see below), whose sum is σ = 2203386120. Its totient is φ = 327682368.

The previous prime is 999997249. The next prime is 999997267. The reversal of 999997254 is 452799999.

It is a junction number, because it is equal to n+sod(n) for n = 999997191 and 999997200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 469747 + ... + 471870.

It is an arithmetic number, because the mean of its divisors is an integer number (91807755).

Almost surely, 2^999997254 is an apocalyptic number.

999997254 is an abundant number, since it is smaller than the sum of its proper divisors (1203388866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999997254 is a wasteful number, since it uses less digits than its factorization.

999997254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941684 (or 941681 counting only the distinct ones).

The product of its digits is 16533720, while the sum is 63.

The square root of 999997254 is about 31622.7331835817. The cubic root of 999997254 is about 999.9990846658. Note that the first 3 decimals are identical.

The spelling of 999997254 in words is "nine hundred ninety-nine million, nine hundred ninety-seven thousand, two hundred fifty-four".