999350792389 has 2 divisors, whose sum is σ = 999350792390. Its totient is φ = 999350792388.

The previous prime is 999350792387. The next prime is 999350792443. The reversal of 999350792389 is 983297053999.

999350792389 = T₈₁₆₂₃₀ + T₈₁₆₂₃₁ + T₈₁₆₂₃₂.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 940624540164 + 58726252225 = 969858^2 + 242335^2 .

It is a cyclic number.

It is not a de Polignac number, because 999350792389 - 2¹ = 999350792387 is a prime.

Together with 999350792387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999350792387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499675396194 + 499675396195.

It is an arithmetic number, because the mean of its divisors is an integer number (499675396195).

Almost surely, 2^999350792389 is an apocalyptic number.

999350792389 is the 816232-nd centered triangular number.

It is an amenable number.

999350792389 is a deficient number, since it is larger than the sum of its proper divisors (1).

999350792389 is an equidigital number, since it uses as much as digits as its factorization.

999350792389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 297606960, while the sum is 73.

The spelling of 999350792389 in words is "nine hundred ninety-nine billion, three hundred fifty million, seven hundred ninety-two thousand, three hundred eighty-nine".