938392649 has 2 divisors, whose sum is σ = 938392650. Its totient is φ = 938392648.

The previous prime is 938392633. The next prime is 938392657. The reversal of 938392649 is 946293839.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 631617424 + 306775225 = 25132^2 + 17515^2 .

It is a cyclic number.

It is not a de Polignac number, because 938392649 - 2⁴ = 938392633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 938392649.

It is not a weakly prime, because it can be changed into another prime (938392619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469196324 + 469196325.

It is an arithmetic number, because the mean of its divisors is an integer number (469196325).

Almost surely, 2^938392649 is an apocalyptic number.

It is an amenable number.

938392649 is a deficient number, since it is larger than the sum of its proper divisors (1).

938392649 is an equidigital number, since it uses as much as digits as its factorization.

938392649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2519424, while the sum is 53.

The square root of 938392649 is about 30633.1952136893. The cubic root of 938392649 is about 979.0274431040.

The spelling of 938392649 in words is "nine hundred thirty-eight million, three hundred ninety-two thousand, six hundred forty-nine".