999088799251 has 2 divisors, whose sum is σ = 999088799252. Its totient is φ = 999088799250.

The previous prime is 999088799249. The next prime is 999088799311. The reversal of 999088799251 is 152997880999.

999088799251 = T₈₁₆₁₂₃ + T₈₁₆₁₂₄ + T₈₁₆₁₂₅.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999088799251 - 2¹ = 999088799249 is a prime.

It is a super-2 number, since 2×999088799251² (a number of 25 digits) contains 22 as substring.

Together with 999088799249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (999088790251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499544399625 + 499544399626.

It is an arithmetic number, because the mean of its divisors is an integer number (499544399626).

Almost surely, 2^999088799251 is an apocalyptic number.

999088799251 is the 816125-th centered triangular number.

999088799251 is a deficient number, since it is larger than the sum of its proper divisors (1).

999088799251 is an equidigital number, since it uses as much as digits as its factorization.

999088799251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 264539520, while the sum is 76.

The spelling of 999088799251 in words is "nine hundred ninety-nine billion, eighty-eight million, seven hundred ninety-nine thousand, two hundred fifty-one".