989970019 has 2 divisors, whose sum is σ = 989970020. Its totient is φ = 989970018.

The previous prime is 989969989. The next prime is 989970029. The reversal of 989970019 is 910079989.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 989970019 - 2¹¹ = 989967971 is a prime.

It is a super-2 number, since 2×989970019² = 1960081277037720722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (989970029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494985009 + 494985010.

It is an arithmetic number, because the mean of its divisors is an integer number (494985010).

Almost surely, 2^989970019 is an apocalyptic number.

989970019 is a deficient number, since it is larger than the sum of its proper divisors (1).

989970019 is an equidigital number, since it uses as much as digits as its factorization.

989970019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 367416, while the sum is 52.

The square root of 989970019 is about 31463.7890121327. The cubic root of 989970019 is about 996.6454324597.

The spelling of 989970019 in words is "nine hundred eighty-nine million, nine hundred seventy thousand, nineteen".