9427942785 has 24 divisors (see below), whose sum is σ = 15920435520. Its totient is φ = 4763589408.

The previous prime is 9427942781. The next prime is 9427942793. The reversal of 9427942785 is 5872497249.

It is not a de Polignac number, because 9427942785 - 2² = 9427942781 is a prime.

It is a super-2 number, since 2×9427942785² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9427942781) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 865125 + ... + 875954.

It is an arithmetic number, because the mean of its divisors is an integer number (663351480).

Almost surely, 2^9427942785 is an apocalyptic number.

9427942785 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

9427942785 is a deficient number, since it is larger than the sum of its proper divisors (6492492735).

9427942785 is a wasteful number, since it uses less digits than its factorization.

9427942785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1741125 (or 1741106 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 57.

The square root of 9427942785 is about 97097.5941257043. The cubic root of 9427942785 is about 2112.5434304062.

The spelling of 9427942785 in words is "nine billion, four hundred twenty-seven million, nine hundred forty-two thousand, seven hundred eighty-five".