989394019 has 2 divisors, whose sum is σ = 989394020. Its totient is φ = 989394018.

The previous prime is 989393989. The next prime is 989394031. The reversal of 989394019 is 910493989.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 989394019 - 2¹⁵ = 989361251 is a prime.

It is a super-2 number, since 2×989394019² = 1957801049665944722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (989394719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494697009 + 494697010.

It is an arithmetic number, because the mean of its divisors is an integer number (494697010).

Almost surely, 2^989394019 is an apocalyptic number.

989394019 is a deficient number, since it is larger than the sum of its proper divisors (1).

989394019 is an equidigital number, since it uses as much as digits as its factorization.

989394019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 629856, while the sum is 52.

The square root of 989394019 is about 31454.6343008467. The cubic root of 989394019 is about 996.4521002942.

The spelling of 989394019 in words is "nine hundred eighty-nine million, three hundred ninety-four thousand, nineteen".