938891972311 has 2 divisors, whose sum is σ = 938891972312. Its totient is φ = 938891972310.

The previous prime is 938891972309. The next prime is 938891972329. The reversal of 938891972311 is 113279198839.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 938891972311 - 2¹ = 938891972309 is a prime.

Together with 938891972309, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 938891972311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (938891972371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469445986155 + 469445986156.

It is an arithmetic number, because the mean of its divisors is an integer number (469445986156).

Almost surely, 2^938891972311 is an apocalyptic number.

938891972311 is a deficient number, since it is larger than the sum of its proper divisors (1).

938891972311 is an equidigital number, since it uses as much as digits as its factorization.

938891972311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 61.

The spelling of 938891972311 in words is "nine hundred thirty-eight billion, eight hundred ninety-one million, nine hundred seventy-two thousand, three hundred eleven".