421688107 has 2 divisors, whose sum is σ = 421688108. Its totient is φ = 421688106.

The previous prime is 421688093. The next prime is 421688119. The reversal of 421688107 is 701886124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421688107 - 2¹¹ = 421686059 is a prime.

It is equal to p_22429558 and since 421688107 and 22429558 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (421688167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210844053 + 210844054.

It is an arithmetic number, because the mean of its divisors is an integer number (210844054).

Almost surely, 2^421688107 is an apocalyptic number.

421688107 is a deficient number, since it is larger than the sum of its proper divisors (1).

421688107 is an equidigital number, since it uses as much as digits as its factorization.

421688107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 421688107 is about 20535.0458241515. The cubic root of 421688107 is about 749.8892322341.

The spelling of 421688107 in words is "four hundred twenty-one million, six hundred eighty-eight thousand, one hundred seven".