421723394107 has 2 divisors, whose sum is σ = 421723394108. Its totient is φ = 421723394106.

The previous prime is 421723394101. The next prime is 421723394111. The reversal of 421723394107 is 701493327124.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421723394107 - 2²³ = 421715005499 is a prime.

It is a super-2 number, since 2×421723394107² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (421723394101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210861697053 + 210861697054.

It is an arithmetic number, because the mean of its divisors is an integer number (210861697054).

Almost surely, 2^421723394107 is an apocalyptic number.

421723394107 is a deficient number, since it is larger than the sum of its proper divisors (1).

421723394107 is an equidigital number, since it uses as much as digits as its factorization.

421723394107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 43.

The spelling of 421723394107 in words is "four hundred twenty-one billion, seven hundred twenty-three million, three hundred ninety-four thousand, one hundred seven".