402424420997 has 2 divisors, whose sum is σ = 402424420998. Its totient is φ = 402424420996.

The previous prime is 402424420991. The next prime is 402424420999. The reversal of 402424420997 is 799024424204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 392935907716 + 9488513281 = 626846^2 + 97409^2 .

It is a cyclic number.

It is not a de Polignac number, because 402424420997 - 2²² = 402420226693 is a prime.

It is a super-2 number, since 2×402424420997² (a number of 24 digits) contains 22 as substring.

Together with 402424420999, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402424420991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201212210498 + 201212210499.

It is an arithmetic number, because the mean of its divisors is an integer number (201212210499).

Almost surely, 2^402424420997 is an apocalyptic number.

It is an amenable number.

402424420997 is a deficient number, since it is larger than the sum of its proper divisors (1).

402424420997 is an equidigital number, since it uses as much as digits as its factorization.

402424420997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1161216, while the sum is 47.

The spelling of 402424420997 in words is "four hundred two billion, four hundred twenty-four million, four hundred twenty thousand, nine hundred ninety-seven".