9081403781 has 2 divisors, whose sum is σ = 9081403782. Its totient is φ = 9081403780.

The previous prime is 9081403777. The next prime is 9081403787. The reversal of 9081403781 is 1873041809.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5935315681 + 3146088100 = 77041^2 + 56090^2 .

It is a cyclic number.

It is not a de Polignac number, because 9081403781 - 2² = 9081403777 is a prime.

It is a super-2 number, since 2×9081403781² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9081403787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4540701890 + 4540701891.

It is an arithmetic number, because the mean of its divisors is an integer number (4540701891).

Almost surely, 2^9081403781 is an apocalyptic number.

It is an amenable number.

9081403781 is a deficient number, since it is larger than the sum of its proper divisors (1).

9081403781 is an equidigital number, since it uses as much as digits as its factorization.

9081403781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 9081403781 is about 95296.3996224411. The cubic root of 9081403781 is about 2086.3363684442.

The spelling of 9081403781 in words is "nine billion, eighty-one million, four hundred three thousand, seven hundred eighty-one".