1329297917 has 2 divisors, whose sum is σ = 1329297918. Its totient is φ = 1329297916.

The previous prime is 1329297883. The next prime is 1329297923. The reversal of 1329297917 is 7197929231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1218079801 + 111218116 = 34901^2 + 10546^2 .

It is a cyclic number.

It is not a de Polignac number, because 1329297917 - 2¹² = 1329293821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1329297967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664648958 + 664648959.

It is an arithmetic number, because the mean of its divisors is an integer number (664648959).

Almost surely, 2^1329297917 is an apocalyptic number.

It is an amenable number.

1329297917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1329297917 is an equidigital number, since it uses as much as digits as its factorization.

1329297917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 428652, while the sum is 50.

The square root of 1329297917 is about 36459.5380799044. The cubic root of 1329297917 is about 1099.5309065958.

The spelling of 1329297917 in words is "one billion, three hundred twenty-nine million, two hundred ninety-seven thousand, nine hundred seventeen".