999749149031 has 2 divisors, whose sum is σ = 999749149032. Its totient is φ = 999749149030.

The previous prime is 999749148991. The next prime is 999749149051. The reversal of 999749149031 is 130941947999.

999749149031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999749149031 - 2³⁴ = 982569279847 is a prime.

It is a super-2 number, since 2×999749149031² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999749149051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499874574515 + 499874574516.

It is an arithmetic number, because the mean of its divisors is an integer number (499874574516).

Almost surely, 2^999749149031 is an apocalyptic number.

999749149031 is the 447158-th centered decagonal number.

999749149031 is a deficient number, since it is larger than the sum of its proper divisors (1).

999749149031 is an equidigital number, since it uses as much as digits as its factorization.

999749149031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19840464, while the sum is 65.

The spelling of 999749149031 in words is "nine hundred ninety-nine billion, seven hundred forty-nine million, one hundred forty-nine thousand, thirty-one".