420667637 has 8 divisors (see below), whose sum is σ = 454083840. Its totient is φ = 387402480.

The previous prime is 420667627. The next prime is 420667661. The reversal of 420667637 is 736766024.

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 420667637 - 2⁶ = 420667573 is a prime.

It is a super-2 number, since 2×420667637² = 353922521638327538, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420667594 and 420667603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420667627) 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, 31937 + ... + 43142.

It is an arithmetic number, because the mean of its divisors is an integer number (56760480).

Almost surely, 2^420667637 is an apocalyptic number.

It is an amenable number.

420667637 is a deficient number, since it is larger than the sum of its proper divisors (33416203).

420667637 is a wasteful number, since it uses less digits than its factorization.

420667637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75523.

The product of its (nonzero) digits is 254016, while the sum is 41.

The square root of 420667637 is about 20510.1837388162. The cubic root of 420667637 is about 749.2838420043.

The spelling of 420667637 in words is "four hundred twenty million, six hundred sixty-seven thousand, six hundred thirty-seven".