9006955781 has 2 divisors, whose sum is σ = 9006955782. Its totient is φ = 9006955780.

The previous prime is 9006955739. The next prime is 9006955787. The reversal of 9006955781 is 1875596009.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8129907556 + 877048225 = 90166^2 + 29615^2 .

It is a cyclic number.

It is not a de Polignac number, because 9006955781 - 2¹⁴ = 9006939397 is a prime.

It is a super-2 number, since 2×9006955781² (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 (9006955787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4503477890 + 4503477891.

It is an arithmetic number, because the mean of its divisors is an integer number (4503477891).

Almost surely, 2^9006955781 is an apocalyptic number.

It is an amenable number.

9006955781 is a deficient number, since it is larger than the sum of its proper divisors (1).

9006955781 is an equidigital number, since it uses as much as digits as its factorization.

9006955781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 680400, while the sum is 50.

The square root of 9006955781 is about 94904.9829092235. The cubic root of 9006955781 is about 2080.6195594115.

The spelling of 9006955781 in words is "nine billion, six million, nine hundred fifty-five thousand, seven hundred eighty-one".