989951219 has 2 divisors, whose sum is σ = 989951220. Its totient is φ = 989951218.

The previous prime is 989951173. The next prime is 989951239. The reversal of 989951219 is 912159989.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 989951219 - 2⁸ = 989950963 is a prime.

It is a super-2 number, since 2×989951219² = 1960006831999171922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (989951239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494975609 + 494975610.

It is an arithmetic number, because the mean of its divisors is an integer number (494975610).

Almost surely, 2^989951219 is an apocalyptic number.

989951219 is a deficient number, since it is larger than the sum of its proper divisors (1).

989951219 is an equidigital number, since it uses as much as digits as its factorization.

989951219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 524880, while the sum is 53.

The square root of 989951219 is about 31463.4902545792. The cubic root of 989951219 is about 996.6391234967.

The spelling of 989951219 in words is "nine hundred eighty-nine million, nine hundred fifty-one thousand, two hundred nineteen".