402340424410423 has 2 divisors, whose sum is σ = 402340424410424. Its totient is φ = 402340424410422.

The previous prime is 402340424410411. The next prime is 402340424410427. The reversal of 402340424410423 is 324014424043204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402340424410423 is a prime.

It is a super-2 number, since 2×402340424410423² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402340424410427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201170212205211 + 201170212205212.

It is an arithmetic number, because the mean of its divisors is an integer number (201170212205212).

Almost surely, 2^{402340424410423} is an apocalyptic number.

402340424410423 is a deficient number, since it is larger than the sum of its proper divisors (1).

402340424410423 is an equidigital number, since it uses as much as digits as its factorization.

402340424410423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 294912, while the sum is 37.

Adding to 402340424410423 its reverse (324014424043204), we get a palindrome (726354848453627).

The spelling of 402340424410423 in words is "four hundred two trillion, three hundred forty billion, four hundred twenty-four million, four hundred ten thousand, four hundred twenty-three".