402544997 has 2 divisors, whose sum is σ = 402544998. Its totient is φ = 402544996.

The previous prime is 402544993. The next prime is 402545029. The reversal of 402544997 is 799445204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 274266721 + 128278276 = 16561^2 + 11326^2 .

It is a cyclic number.

It is not a de Polignac number, because 402544997 - 2² = 402544993 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402544993) 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, 201272498 + 201272499.

It is an arithmetic number, because the mean of its divisors is an integer number (201272499).

Almost surely, 2^402544997 is an apocalyptic number.

It is an amenable number.

402544997 is a deficient number, since it is larger than the sum of its proper divisors (1).

402544997 is an equidigital number, since it uses as much as digits as its factorization.

402544997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 402544997 is about 20063.5240424009. The cubic root of 402544997 is about 738.3656388134.

The spelling of 402544997 in words is "four hundred two million, five hundred forty-four thousand, nine hundred ninety-seven".