421606969 has 8 divisors (see below), whose sum is σ = 482251968. Its totient is φ = 361065840.

The previous prime is 421606961. The next prime is 421606981. The reversal of 421606969 is 969606124.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421606969 - 2³ = 421606961 is a prime.

It is a super-2 number, since 2×421606969² = 355504872618733922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421606961) 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 7 ways as a sum of consecutive naturals, for example, 17062 + ... + 33679.

It is an arithmetic number, because the mean of its divisors is an integer number (60281496).

Almost surely, 2^421606969 is an apocalyptic number.

It is an amenable number.

421606969 is a deficient number, since it is larger than the sum of its proper divisors (60644999).

421606969 is a wasteful number, since it uses less digits than its factorization.

421606969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51935.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 421606969 is about 20533.0701308889. The cubic root of 421606969 is about 749.8411331656.

The spelling of 421606969 in words is "four hundred twenty-one million, six hundred six thousand, nine hundred sixty-nine".