16430989 has 2 divisors, whose sum is σ = 16430990. Its totient is φ = 16430988.

The previous prime is 16430977. The next prime is 16431017. The reversal of 16430989 is 98903461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11957764 + 4473225 = 3458^2 + 2115^2 .

It is a cyclic number.

It is not a de Polignac number, because 16430989 - 2⁷ = 16430861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16430189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8215494 + 8215495.

It is an arithmetic number, because the mean of its divisors is an integer number (8215495).

Almost surely, 2^16430989 is an apocalyptic number.

It is an amenable number.

16430989 is a deficient number, since it is larger than the sum of its proper divisors (1).

16430989 is an equidigital number, since it uses as much as digits as its factorization.

16430989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 16430989 is about 4053.5156346066. The cubic root of 16430989 is about 254.2267438146.

The spelling of 16430989 in words is "sixteen million, four hundred thirty thousand, nine hundred eighty-nine".