420102989 has 4 divisors (see below), whose sum is σ = 422885280. Its totient is φ = 417320700.

The previous prime is 420102971. The next prime is 420103007. The reversal of 420102989 is 989201024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (420102971) and next prime (420103007).

It is a cyclic number.

It is not a de Polignac number, because 420102989 - 2¹² = 420098893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420102689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1390919 + ... + 1391220.

It is an arithmetic number, because the mean of its divisors is an integer number (105721320).

Almost surely, 2^420102989 is an apocalyptic number.

It is an amenable number.

420102989 is a deficient number, since it is larger than the sum of its proper divisors (2782291).

420102989 is a wasteful number, since it uses less digits than its factorization.

420102989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2782290.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 420102989 is about 20496.4140522190. The cubic root of 420102989 is about 748.9484457413.

The spelling of 420102989 in words is "four hundred twenty million, one hundred two thousand, nine hundred eighty-nine".