402763993 has 2 divisors, whose sum is σ = 402763994. Its totient is φ = 402763992.

The previous prime is 402763973. The next prime is 402764039. The reversal of 402763993 is 399367204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 373571584 + 29192409 = 19328^2 + 5403^2 .

It is a cyclic number.

It is not a de Polignac number, because 402763993 - 2¹⁷ = 402632921 is a prime.

It is not a weakly prime, because it can be changed into another prime (402763973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201381996 + 201381997.

It is an arithmetic number, because the mean of its divisors is an integer number (201381997).

Almost surely, 2^402763993 is an apocalyptic number.

It is an amenable number.

402763993 is a deficient number, since it is larger than the sum of its proper divisors (1).

402763993 is an equidigital number, since it uses as much as digits as its factorization.

402763993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 43.

The square root of 402763993 is about 20068.9808660031. The cubic root of 402763993 is about 738.4995118864.

The spelling of 402763993 in words is "four hundred two million, seven hundred sixty-three thousand, nine hundred ninety-three".