421311599 has 2 divisors, whose sum is σ = 421311600. Its totient is φ = 421311598.

The previous prime is 421311577. The next prime is 421311617. The reversal of 421311599 is 995113124.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421311599 - 2¹² = 421307503 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421311559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210655799 + 210655800.

It is an arithmetic number, because the mean of its divisors is an integer number (210655800).

Almost surely, 2^421311599 is an apocalyptic number.

421311599 is a deficient number, since it is larger than the sum of its proper divisors (1).

421311599 is an equidigital number, since it uses as much as digits as its factorization.

421311599 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 35.

The square root of 421311599 is about 20525.8763272120. The cubic root of 421311599 is about 749.6659840072.

The spelling of 421311599 in words is "four hundred twenty-one million, three hundred eleven thousand, five hundred ninety-nine".