421087687 has 2 divisors, whose sum is σ = 421087688. Its totient is φ = 421087686.

The previous prime is 421087679. The next prime is 421087757. The reversal of 421087687 is 786780124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421087687 - 2³ = 421087679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421087187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210543843 + 210543844.

It is an arithmetic number, because the mean of its divisors is an integer number (210543844).

Almost surely, 2^421087687 is an apocalyptic number.

421087687 is a deficient number, since it is larger than the sum of its proper divisors (1).

421087687 is an equidigital number, since it uses as much as digits as its factorization.

421087687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150528, while the sum is 43.

The square root of 421087687 is about 20520.4212188737. The cubic root of 421087687 is about 749.5331536144.

The spelling of 421087687 in words is "four hundred twenty-one million, eighty-seven thousand, six hundred eighty-seven".