402968669981 has 2 divisors, whose sum is σ = 402968669982. Its totient is φ = 402968669980.

The previous prime is 402968669977. The next prime is 402968670019. The reversal of 402968669981 is 189966869204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 291740416900 + 111228253081 = 540130^2 + 333509^2 .

It is a cyclic number.

It is not a de Polignac number, because 402968669981 - 2² = 402968669977 is a prime.

It is a super-2 number, since 2×402968669981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402968669941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201484334990 + 201484334991.

It is an arithmetic number, because the mean of its divisors is an integer number (201484334991).

Almost surely, 2^402968669981 is an apocalyptic number.

It is an amenable number.

402968669981 is a deficient number, since it is larger than the sum of its proper divisors (1).

402968669981 is an equidigital number, since it uses as much as digits as its factorization.

402968669981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80621568, while the sum is 68.

The spelling of 402968669981 in words is "four hundred two billion, nine hundred sixty-eight million, six hundred sixty-nine thousand, nine hundred eighty-one".