9940819137 has 16 divisors (see below), whose sum is σ = 13297253760. Its totient is φ = 6605827200.

The previous prime is 9940819111. The next prime is 9940819153. The reversal of 9940819137 is 7319180499.

It is a happy number.

It is not a de Polignac number, because 9940819137 - 2¹⁰ = 9940818113 is a prime.

It is a super-2 number, since 2×9940819137² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9940819137.

It is not an unprimeable number, because it can be changed into a prime (9940812137) by changing a digit.

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, 1905789 + ... + 1910997.

It is an arithmetic number, because the mean of its divisors is an integer number (831078360).

Almost surely, 2^9940819137 is an apocalyptic number.

It is an amenable number.

9940819137 is a deficient number, since it is larger than the sum of its proper divisors (3356434623).

9940819137 is a wasteful number, since it uses less digits than its factorization.

9940819137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7144.

The product of its (nonzero) digits is 489888, while the sum is 51.

The square root of 9940819137 is about 99703.6565879106. The cubic root of 9940819137 is about 2150.1762348416.

The spelling of 9940819137 in words is "nine billion, nine hundred forty million, eight hundred nineteen thousand, one hundred thirty-seven".