421316677 has 8 divisors (see below), whose sum is σ = 423646200. Its totient is φ = 418993344.

The previous prime is 421316657. The next prime is 421316689. The reversal of 421316677 is 776613124.

It is a Cunningham number, because it is equal to 20526²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 421316676 = 1^2 + 20526^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421316677 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 (421316657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202599 + ... + 204667.

It is an arithmetic number, because the mean of its divisors is an integer number (52955775).

Almost surely, 2^421316677 is an apocalyptic number.

It is an amenable number.

421316677 is a deficient number, since it is larger than the sum of its proper divisors (2329523).

421316677 is a wasteful number, since it uses less digits than its factorization.

421316677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3095.

The product of its digits is 42336, while the sum is 37.

The square root of 421316677 is about 20526.0000243593. Note that the first 4 decimals coincide. The cubic root of 421316677 is about 749.6689958624.

The spelling of 421316677 in words is "four hundred twenty-one million, three hundred sixteen thousand, six hundred seventy-seven".