402068647 has 2 divisors, whose sum is σ = 402068648. Its totient is φ = 402068646.

The previous prime is 402068621. The next prime is 402068663. The reversal of 402068647 is 746860204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402068647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402068347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201034323 + 201034324.

It is an arithmetic number, because the mean of its divisors is an integer number (201034324).

Almost surely, 2^402068647 is an apocalyptic number.

402068647 is a deficient number, since it is larger than the sum of its proper divisors (1).

402068647 is an equidigital number, since it uses as much as digits as its factorization.

402068647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 402068647 is about 20051.6494832719. The cubic root of 402068647 is about 738.0742765213.

The spelling of 402068647 in words is "four hundred two million, sixty-eight thousand, six hundred forty-seven".