939172049 has 2 divisors, whose sum is σ = 939172050. Its totient is φ = 939172048.

The previous prime is 939172037. The next prime is 939172057. The reversal of 939172049 is 940271939.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 937890625 + 1281424 = 30625^2 + 1132^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-939172049 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (939172019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469586024 + 469586025.

It is an arithmetic number, because the mean of its divisors is an integer number (469586025).

Almost surely, 2^939172049 is an apocalyptic number.

It is an amenable number.

939172049 is a deficient number, since it is larger than the sum of its proper divisors (1).

939172049 is an equidigital number, since it uses as much as digits as its factorization.

939172049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 939172049 is about 30645.9140669682. The cubic root of 939172049 is about 979.2984180990.

The spelling of 939172049 in words is "nine hundred thirty-nine million, one hundred seventy-two thousand, forty-nine".