420957669 has 12 divisors (see below), whose sum is σ = 616941248. Its totient is φ = 255125640.

The previous prime is 420957637. The next prime is 420957671. The reversal of 420957669 is 966759024.

It is not a de Polignac number, because 420957669 - 2⁵ = 420957637 is a prime.

It is a super-2 number, since 2×420957669² = 354410718179827122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420957679) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 579469 + ... + 580194.

Almost surely, 2^420957669 is an apocalyptic number.

It is an amenable number.

420957669 is a deficient number, since it is larger than the sum of its proper divisors (195983579).

420957669 is a wasteful number, since it uses less digits than its factorization.

420957669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159688 (or 1159677 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 48.

The square root of 420957669 is about 20517.2529593998. The cubic root of 420957669 is about 749.4560019614.

The spelling of 420957669 in words is "four hundred twenty million, nine hundred fifty-seven thousand, six hundred sixty-nine".