402324021391 has 2 divisors, whose sum is σ = 402324021392. Its totient is φ = 402324021390.

The previous prime is 402324021373. The next prime is 402324021403. The reversal of 402324021391 is 193120423204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402324021391 - 2¹¹ = 402324019343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402324022391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201162010695 + 201162010696.

It is an arithmetic number, because the mean of its divisors is an integer number (201162010696).

Almost surely, 2^402324021391 is an apocalyptic number.

402324021391 is a deficient number, since it is larger than the sum of its proper divisors (1).

402324021391 is an equidigital number, since it uses as much as digits as its factorization.

402324021391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

Adding to 402324021391 its reverse (193120423204), we get a palindrome (595444444595).

The spelling of 402324021391 in words is "four hundred two billion, three hundred twenty-four million, twenty-one thousand, three hundred ninety-one".