994991539 has 2 divisors, whose sum is σ = 994991540. Its totient is φ = 994991538.

The previous prime is 994991507. The next prime is 994991549. The reversal of 994991539 is 935199499.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 994991539 - 2⁵ = 994991507 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (994991549) by changing a digit.

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 as a sum of consecutive naturals, namely, 497495769 + 497495770.

It is an arithmetic number, because the mean of its divisors is an integer number (497495770).

Almost surely, 2^994991539 is an apocalyptic number.

994991539 is a deficient number, since it is larger than the sum of its proper divisors (1).

994991539 is an equidigital number, since it uses as much as digits as its factorization.

994991539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3542940, while the sum is 58.

The square root of 994991539 is about 31543.4864750237. The cubic root of 994991539 is about 998.3277180319.

The spelling of 994991539 in words is "nine hundred ninety-four million, nine hundred ninety-one thousand, five hundred thirty-nine".