424002391 has 2 divisors, whose sum is σ = 424002392. Its totient is φ = 424002390.

The previous prime is 424002353. The next prime is 424002409. The reversal of 424002391 is 193200424.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 424002391 - 2¹⁹ = 423478103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (424002191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212001195 + 212001196.

It is an arithmetic number, because the mean of its divisors is an integer number (212001196).

Almost surely, 2^424002391 is an apocalyptic number.

424002391 is a deficient number, since it is larger than the sum of its proper divisors (1).

424002391 is an equidigital number, since it uses as much as digits as its factorization.

424002391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 424002391 is about 20591.3183405046. The cubic root of 424002391 is about 751.2585629924.

The spelling of 424002391 in words is "four hundred twenty-four million, two thousand, three hundred ninety-one".