402000637 has 2 divisors, whose sum is σ = 402000638. Its totient is φ = 402000636.

The previous prime is 402000631. The next prime is 402000673. The reversal of 402000637 is 736000204.

Together with next prime (402000673) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 277588921 + 124411716 = 16661^2 + 11154^2 .

It is a cyclic number.

It is not a de Polignac number, because 402000637 - 2¹¹ = 401998589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402000631) 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, 201000318 + 201000319.

It is an arithmetic number, because the mean of its divisors is an integer number (201000319).

Almost surely, 2^402000637 is an apocalyptic number.

It is an amenable number.

402000637 is a deficient number, since it is larger than the sum of its proper divisors (1).

402000637 is an equidigital number, since it uses as much as digits as its factorization.

402000637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 402000637 is about 20049.9535410933. The cubic root of 402000637 is about 738.0326590326.

The spelling of 402000637 in words is "four hundred two million, six hundred thirty-seven", and thus it is an aban number.