420390937 has 4 divisors (see below), whose sum is σ = 422908416. Its totient is φ = 417873460.

The previous prime is 420390913. The next prime is 420390947. The reversal of 420390937 is 739093024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420390937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420390896 and 420390905.

It is not an unprimeable number, because it can be changed into a prime (420390947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1258489 + ... + 1258822.

It is an arithmetic number, because the mean of its divisors is an integer number (105727104).

Almost surely, 2^420390937 is an apocalyptic number.

It is an amenable number.

420390937 is a deficient number, since it is larger than the sum of its proper divisors (2517479).

420390937 is a wasteful number, since it uses less digits than its factorization.

420390937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2517478.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 420390937 is about 20503.4371996502. The cubic root of 420390937 is about 749.1195220084.

The spelling of 420390937 in words is "four hundred twenty million, three hundred ninety thousand, nine hundred thirty-seven".