402680437 has 2 divisors, whose sum is σ = 402680438. Its totient is φ = 402680436.

The previous prime is 402680419. The next prime is 402680449. The reversal of 402680437 is 734086204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 377369476 + 25310961 = 19426^2 + 5031^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402680437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402687437) 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, 201340218 + 201340219.

It is an arithmetic number, because the mean of its divisors is an integer number (201340219).

Almost surely, 2^402680437 is an apocalyptic number.

It is an amenable number.

402680437 is a deficient number, since it is larger than the sum of its proper divisors (1).

402680437 is an equidigital number, since it uses as much as digits as its factorization.

402680437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 402680437 is about 20066.8990379680. The cubic root of 402680437 is about 738.4484395182.

The spelling of 402680437 in words is "four hundred two million, six hundred eighty thousand, four hundred thirty-seven".