421646069 has 8 divisors (see below), whose sum is σ = 454561632. Its totient is φ = 388799280.

The previous prime is 421646063. The next prime is 421646101. The reversal of 421646069 is 960646124.

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 a de Polignac number, because none of the positive numbers 2^k-421646069 is a prime.

It is a super-2 number, since 2×421646069² = 355570815006305522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421646063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4079 + ... + 29324.

It is an arithmetic number, because the mean of its divisors is an integer number (56820204).

Almost surely, 2^421646069 is an apocalyptic number.

It is an amenable number.

421646069 is a deficient number, since it is larger than the sum of its proper divisors (32915563).

421646069 is a wasteful number, since it uses less digits than its factorization.

421646069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34387.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 421646069 is about 20534.0222314090. The cubic root of 421646069 is about 749.8643126386.

The spelling of 421646069 in words is "four hundred twenty-one million, six hundred forty-six thousand, sixty-nine".