938643677 has 2 divisors, whose sum is σ = 938643678. Its totient is φ = 938643676.

The previous prime is 938643649. The next prime is 938643679. The reversal of 938643677 is 776346839.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 832841881 + 105801796 = 28859^2 + 10286^2 .

It is a cyclic number.

It is not a de Polignac number, because 938643677 - 2⁶ = 938643613 is a prime.

Together with 938643679, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (938643679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469321838 + 469321839.

It is an arithmetic number, because the mean of its divisors is an integer number (469321839).

Almost surely, 2^938643677 is an apocalyptic number.

It is an amenable number.

938643677 is a deficient number, since it is larger than the sum of its proper divisors (1).

938643677 is an equidigital number, since it uses as much as digits as its factorization.

938643677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4572288, while the sum is 53.

The square root of 938643677 is about 30637.2922595976. The cubic root of 938643677 is about 979.1147347048.

The spelling of 938643677 in words is "nine hundred thirty-eight million, six hundred forty-three thousand, six hundred seventy-seven".