7938039457 has 2 divisors, whose sum is σ = 7938039458. Its totient is φ = 7938039456.

The previous prime is 7938039371. The next prime is 7938039463. The reversal of 7938039457 is 7549308397.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7602270481 + 335768976 = 87191^2 + 18324^2 .

It is an emirp because it is prime and its reverse (7549308397) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7938039457 - 2³¹ = 5790555809 is a prime.

It is a super-3 number, since 3×7938039457³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7938039398 and 7938039407.

It is not a weakly prime, because it can be changed into another prime (7938039497) 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, 3969019728 + 3969019729.

It is an arithmetic number, because the mean of its divisors is an integer number (3969019729).

Almost surely, 2^7938039457 is an apocalyptic number.

It is an amenable number.

7938039457 is a deficient number, since it is larger than the sum of its proper divisors (1).

7938039457 is an equidigital number, since it uses as much as digits as its factorization.

7938039457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5715360, while the sum is 55.

The square root of 7938039457 is about 89095.6758602795. The cubic root of 7938039457 is about 1994.8232335221.

The spelling of 7938039457 in words is "seven billion, nine hundred thirty-eight million, thirty-nine thousand, four hundred fifty-seven".