420688677 has 4 divisors (see below), whose sum is σ = 560918240. Its totient is φ = 280459116.

The previous prime is 420688673. The next prime is 420688679. The reversal of 420688677 is 776886024.

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 not a de Polignac number, because 420688677 - 2² = 420688673 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 (420688673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70114777 + ... + 70114782.

It is an arithmetic number, because the mean of its divisors is an integer number (140229560).

Almost surely, 2^420688677 is an apocalyptic number.

It is an amenable number.

420688677 is a deficient number, since it is larger than the sum of its proper divisors (140229563).

420688677 is a wasteful number, since it uses less digits than its factorization.

420688677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140229562.

The product of its (nonzero) digits is 903168, while the sum is 48.

The square root of 420688677 is about 20510.6966483345. The cubic root of 420688677 is about 749.2963337894.

The spelling of 420688677 in words is "four hundred twenty million, six hundred eighty-eight thousand, six hundred seventy-seven".