402471897349 has 2 divisors, whose sum is σ = 402471897350. Its totient is φ = 402471897348.

The previous prime is 402471897301. The next prime is 402471897431. The reversal of 402471897349 is 943798174204.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 382179894849 + 20292002500 = 618207^2 + 142450^2 .

It is a cyclic number.

It is not a de Polignac number, because 402471897349 - 2²⁷ = 402337679621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 402471897293 and 402471897302.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402471897049) 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, 201235948674 + 201235948675.

It is an arithmetic number, because the mean of its divisors is an integer number (201235948675).

Almost surely, 2^402471897349 is an apocalyptic number.

It is an amenable number.

402471897349 is a deficient number, since it is larger than the sum of its proper divisors (1).

402471897349 is an equidigital number, since it uses as much as digits as its factorization.

402471897349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12192768, while the sum is 58.

The spelling of 402471897349 in words is "four hundred two billion, four hundred seventy-one million, eight hundred ninety-seven thousand, three hundred forty-nine".