420092989 has 2 divisors, whose sum is σ = 420092990. Its totient is φ = 420092988.

The previous prime is 420092987. The next prime is 420093029. The reversal of 420092989 is 989290024.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 314352900 + 105740089 = 17730^2 + 10283^2 .

It is a cyclic number.

It is not a de Polignac number, because 420092989 - 2¹ = 420092987 is a prime.

Together with 420092987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420092987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210046494 + 210046495.

It is an arithmetic number, because the mean of its divisors is an integer number (210046495).

Almost surely, 2^420092989 is an apocalyptic number.

It is an amenable number.

420092989 is a deficient number, since it is larger than the sum of its proper divisors (1).

420092989 is an equidigital number, since it uses as much as digits as its factorization.

420092989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 420092989 is about 20496.1701056563. The cubic root of 420092989 is about 748.9425031161.

The spelling of 420092989 in words is "four hundred twenty million, ninety-two thousand, nine hundred eighty-nine".