999272866 has 4 divisors (see below), whose sum is σ = 1498909302. Its totient is φ = 499636432.

The previous prime is 999272863. The next prime is 999272959. The reversal of 999272866 is 668272999.

999272866 = T₂₅₈₀₉ + T₂₅₈₁₀ + T₂₅₈₁₁.

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

It can be written as a sum of positive squares in only one way, i.e., 907515625 + 91757241 = 30125^2 + 9579^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 999272866.

It is not an unprimeable number, because it can be changed into a prime (999272863) 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 as a sum of consecutive naturals, namely, 249818215 + ... + 249818218.

Almost surely, 2^999272866 is an apocalyptic number.

999272866 is the 25811-st centered triangular number.

999272866 is a deficient number, since it is larger than the sum of its proper divisors (499636436).

999272866 is a wasteful number, since it uses less digits than its factorization.

999272866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499636435.

The product of its digits is 5878656, while the sum is 58.

The square root of 999272866 is about 31611.2775129383. The cubic root of 999272866 is about 999.7575632292.

The spelling of 999272866 in words is "nine hundred ninety-nine million, two hundred seventy-two thousand, eight hundred sixty-six".