9143961385 has 16 divisors (see below), whose sum is σ = 11978691984. Its totient is φ = 6659960832.

The previous prime is 9143961361. The next prime is 9143961401. The reversal of 9143961385 is 5831693419.

It can be written as a sum of positive squares in 8 ways, for example, as 187799616 + 8956161769 = 13704^2 + 94637^2 .

It is a cyclic number.

It is not a de Polignac number, because 9143961385 - 2²¹ = 9141864233 is a prime.

It is a super-2 number, since 2×9143961385² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 958792 + ... + 968281.

It is an arithmetic number, because the mean of its divisors is an integer number (748668249).

Almost surely, 2^9143961385 is an apocalyptic number.

It is an amenable number.

9143961385 is a deficient number, since it is larger than the sum of its proper divisors (2834730599).

9143961385 is a wasteful number, since it uses less digits than its factorization.

9143961385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1927164.

The product of its digits is 699840, while the sum is 49.

The square root of 9143961385 is about 95624.0627927929. The cubic root of 9143961385 is about 2091.1160134012.

The spelling of 9143961385 in words is "nine billion, one hundred forty-three million, nine hundred sixty-one thousand, three hundred eighty-five".