402046493 has 2 divisors, whose sum is σ = 402046494. Its totient is φ = 402046492.

The previous prime is 402046487. The next prime is 402046501. The reversal of 402046493 is 394640204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 381733444 + 20313049 = 19538^2 + 4507^2 .

It is a cyclic number.

It is not a de Polignac number, because 402046493 - 2²⁴ = 385269277 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402046433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201023246 + 201023247.

It is an arithmetic number, because the mean of its divisors is an integer number (201023247).

Almost surely, 2^402046493 is an apocalyptic number.

It is an amenable number.

402046493 is a deficient number, since it is larger than the sum of its proper divisors (1).

402046493 is an equidigital number, since it uses as much as digits as its factorization.

402046493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 402046493 is about 20051.0970522812. The cubic root of 402046493 is about 738.0607202973.

Adding to 402046493 its reverse (394640204), we get a palindrome (796686697).

The spelling of 402046493 in words is "four hundred two million, forty-six thousand, four hundred ninety-three".