421347687 has 4 divisors (see below), whose sum is σ = 561796920. Its totient is φ = 280898456.

The previous prime is 421347683. The next prime is 421347709. The reversal of 421347687 is 786743124.

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 421347687 - 2² = 421347683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421347683) 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, 70224612 + ... + 70224617.

It is an arithmetic number, because the mean of its divisors is an integer number (140449230).

Almost surely, 2^421347687 is an apocalyptic number.

421347687 is a deficient number, since it is larger than the sum of its proper divisors (140449233).

421347687 is a wasteful number, since it uses less digits than its factorization.

421347687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140449232.

The product of its digits is 225792, while the sum is 42.

The square root of 421347687 is about 20526.7553938756. The cubic root of 421347687 is about 749.6873879386.

The spelling of 421347687 in words is "four hundred twenty-one million, three hundred forty-seven thousand, six hundred eighty-seven".