402342420191 has 2 divisors, whose sum is σ = 402342420192. Its totient is φ = 402342420190.

The previous prime is 402342420107. The next prime is 402342420197. The reversal of 402342420191 is 191024243204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402342420191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402342420197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201171210095 + 201171210096.

It is an arithmetic number, because the mean of its divisors is an integer number (201171210096).

Almost surely, 2^402342420191 is an apocalyptic number.

402342420191 is a deficient number, since it is larger than the sum of its proper divisors (1).

402342420191 is an equidigital number, since it uses as much as digits as its factorization.

402342420191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

Adding to 402342420191 its reverse (191024243204), we get a palindrome (593366663395).

The spelling of 402342420191 in words is "four hundred two billion, three hundred forty-two million, four hundred twenty thousand, one hundred ninety-one".