420658779 has 4 divisors (see below), whose sum is σ = 560878376. Its totient is φ = 280439184.

The previous prime is 420658759. The next prime is 420658781. The reversal of 420658779 is 977856024.

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

It is not a de Polignac number, because 420658779 - 2⁹ = 420658267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420658759) 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, 70109794 + ... + 70109799.

It is an arithmetic number, because the mean of its divisors is an integer number (140219594).

Almost surely, 2^420658779 is an apocalyptic number.

420658779 is a deficient number, since it is larger than the sum of its proper divisors (140219597).

420658779 is a wasteful number, since it uses less digits than its factorization.

420658779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140219596.

The product of its (nonzero) digits is 846720, while the sum is 48.

The square root of 420658779 is about 20509.9677961717. The cubic root of 420658779 is about 749.2785827431.

The spelling of 420658779 in words is "four hundred twenty million, six hundred fifty-eight thousand, seven hundred seventy-nine".