938891972611 has 2 divisors, whose sum is σ = 938891972612. Its totient is φ = 938891972610.

The previous prime is 938891972609. The next prime is 938891972657. The reversal of 938891972611 is 116279198839.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 938891972611 - 2¹ = 938891972609 is a prime.

Together with 938891972609, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (938891972311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469445986305 + 469445986306.

It is an arithmetic number, because the mean of its divisors is an integer number (469445986306).

Almost surely, 2^938891972611 is an apocalyptic number.

938891972611 is a deficient number, since it is larger than the sum of its proper divisors (1).

938891972611 is an equidigital number, since it uses as much as digits as its factorization.

938891972611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11757312, while the sum is 64.

The spelling of 938891972611 in words is "nine hundred thirty-eight billion, eight hundred ninety-one million, nine hundred seventy-two thousand, six hundred eleven".