420390969 has 16 divisors (see below), whose sum is σ = 580177920. Its totient is φ = 270481680.

The previous prime is 420390967. The next prime is 420390973. The reversal of 420390969 is 969093024.

It is not a de Polignac number, because 420390969 - 2¹ = 420390967 is a prime.

It is a super-2 number, since 2×420390969² = 353457133633517922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 420390969.

It is not an unprimeable number, because it can be changed into a prime (420390967) 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 in 15 ways as a sum of consecutive naturals, for example, 29284 + ... + 41210.

It is an arithmetic number, because the mean of its divisors is an integer number (36261120).

Almost surely, 2^420390969 is an apocalyptic number.

It is an amenable number.

420390969 is a deficient number, since it is larger than the sum of its proper divisors (159786951).

420390969 is a wasteful number, since it uses less digits than its factorization.

420390969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12340.

The product of its (nonzero) digits is 104976, while the sum is 42.

The square root of 420390969 is about 20503.4379800072. The cubic root of 420390969 is about 749.1195410160.

The spelling of 420390969 in words is "four hundred twenty million, three hundred ninety thousand, nine hundred sixty-nine".