9942283649 has 4 divisors (see below), whose sum is σ = 9983538180. Its totient is φ = 9901029120.

The previous prime is 9942283619. The next prime is 9942283679. The reversal of 9942283649 is 9463822499.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (9942283619) and next prime (9942283679).

It can be written as a sum of positive squares in 2 ways, for example, as 5452345600 + 4489938049 = 73840^2 + 67007^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9942283649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9942283594 and 9942283603.

It is not an unprimeable number, because it can be changed into a prime (9942283609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20626904 + ... + 20627385.

It is an arithmetic number, because the mean of its divisors is an integer number (2495884545).

Almost surely, 2^9942283649 is an apocalyptic number.

It is an amenable number.

9942283649 is a deficient number, since it is larger than the sum of its proper divisors (41254531).

9942283649 is a wasteful number, since it uses less digits than its factorization.

9942283649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41254530.

The product of its digits is 6718464, while the sum is 56.

The square root of 9942283649 is about 99711.0006418550. Note that the first 3 decimals coincide. The cubic root of 9942283649 is about 2150.2818198452.

The spelling of 9942283649 in words is "nine billion, nine hundred forty-two million, two hundred eighty-three thousand, six hundred forty-nine".