1339297657 has 2 divisors, whose sum is σ = 1339297658. Its totient is φ = 1339297656.

The previous prime is 1339297607. The next prime is 1339297703. The reversal of 1339297657 is 7567929331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1058265961 + 281031696 = 32531^2 + 16764^2 .

It is a cyclic number.

It is not a de Polignac number, because 1339297657 - 2¹⁵ = 1339264889 is a prime.

It is not a weakly prime, because it can be changed into another prime (1339297607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669648828 + 669648829.

It is an arithmetic number, because the mean of its divisors is an integer number (669648829).

Almost surely, 2^1339297657 is an apocalyptic number.

It is an amenable number.

1339297657 is a deficient number, since it is larger than the sum of its proper divisors (1).

1339297657 is an equidigital number, since it uses as much as digits as its factorization.

1339297657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2143260, while the sum is 52.

The square root of 1339297657 is about 36596.4159037466. The cubic root of 1339297657 is about 1102.2811221817.

The spelling of 1339297657 in words is "one billion, three hundred thirty-nine million, two hundred ninety-seven thousand, six hundred fifty-seven".