420785397 has 6 divisors (see below), whose sum is σ = 607801142. Its totient is φ = 280523592.

The previous prime is 420785383. The next prime is 420785399. The reversal of 420785397 is 793587024.

420785397 is a `hidden beast` number, since 42 + 0 + 78 + 539 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 280931121 + 139854276 = 16761^2 + 11826^2 .

It is not a de Polignac number, because 420785397 - 2⁶ = 420785333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420785399) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23376958 + ... + 23376975.

Almost surely, 2^420785397 is an apocalyptic number.

It is an amenable number.

420785397 is a deficient number, since it is larger than the sum of its proper divisors (187015745).

420785397 is a wasteful number, since it uses less digits than its factorization.

420785397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46753939 (or 46753936 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 420785397 is about 20513.0543069529. The cubic root of 420785397 is about 749.3537526457.

The spelling of 420785397 in words is "four hundred twenty million, seven hundred eighty-five thousand, three hundred ninety-seven".