402537643 has 2 divisors, whose sum is σ = 402537644. Its totient is φ = 402537642.

The previous prime is 402537637. The next prime is 402537649. The reversal of 402537643 is 346735204.

It is a balanced prime because it is at equal distance from previous prime (402537637) and next prime (402537649).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402537643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 402537599 and 402537608.

It is not a weakly prime, because it can be changed into another prime (402537649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201268821 + 201268822.

It is an arithmetic number, because the mean of its divisors is an integer number (201268822).

Almost surely, 2^402537643 is an apocalyptic number.

402537643 is a deficient number, since it is larger than the sum of its proper divisors (1).

402537643 is an equidigital number, since it uses as much as digits as its factorization.

402537643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 34.

The square root of 402537643 is about 20063.3407736598. The cubic root of 402537643 is about 738.3611424432.

The spelling of 402537643 in words is "four hundred two million, five hundred thirty-seven thousand, six hundred forty-three".