9940812137 has 2 divisors, whose sum is σ = 9940812138. Its totient is φ = 9940812136.

The previous prime is 9940812131. The next prime is 9940812139. The reversal of 9940812137 is 7312180499.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9907415296 + 33396841 = 99536^2 + 5779^2 .

It is a cyclic number.

It is not a de Polignac number, because 9940812137 - 2¹⁰ = 9940811113 is a prime.

Together with 9940812139, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9940812131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4970406068 + 4970406069.

It is an arithmetic number, because the mean of its divisors is an integer number (4970406069).

Almost surely, 2^9940812137 is an apocalyptic number.

It is an amenable number.

9940812137 is a deficient number, since it is larger than the sum of its proper divisors (1).

9940812137 is an equidigital number, since it uses as much as digits as its factorization.

9940812137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 9940812137 is about 99703.6214838759. The cubic root of 9940812137 is about 2150.1757301469.

The spelling of 9940812137 in words is "nine billion, nine hundred forty million, eight hundred twelve thousand, one hundred thirty-seven".