420531899 has 4 divisors (see below), whose sum is σ = 431897664. Its totient is φ = 409166136.

The previous prime is 420531869. The next prime is 420531901. The reversal of 420531899 is 998135024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420531899 - 2¹⁶ = 420466363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420531809) 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, 5682827 + ... + 5682900.

It is an arithmetic number, because the mean of its divisors is an integer number (107974416).

Almost surely, 2^420531899 is an apocalyptic number.

420531899 is a deficient number, since it is larger than the sum of its proper divisors (11365765).

420531899 is a wasteful number, since it uses less digits than its factorization.

420531899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11365764.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 420531899 is about 20506.8744327360. The cubic root of 420531899 is about 749.2032421653.

The spelling of 420531899 in words is "four hundred twenty million, five hundred thirty-one thousand, eight hundred ninety-nine".