420508699 has 4 divisors (see below), whose sum is σ = 452855536. Its totient is φ = 388161864.

The previous prime is 420508687. The next prime is 420508709. The reversal of 420508699 is 996805024.

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 420508699 - 2⁵ = 420508667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420508679) 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, 16173399 + ... + 16173424.

It is an arithmetic number, because the mean of its divisors is an integer number (113213884).

Almost surely, 2^420508699 is an apocalyptic number.

420508699 is a deficient number, since it is larger than the sum of its proper divisors (32346837).

420508699 is a wasteful number, since it uses less digits than its factorization.

420508699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32346836.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 420508699 is about 20506.3087609643. The cubic root of 420508699 is about 749.1894645067.

The spelling of 420508699 in words is "four hundred twenty million, five hundred eight thousand, six hundred ninety-nine".