1329940949 has 2 divisors, whose sum is σ = 1329940950. Its totient is φ = 1329940948.

The previous prime is 1329940943. The next prime is 1329941021. The reversal of 1329940949 is 9490499231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1329112849 + 828100 = 36457^2 + 910^2 .

It is a cyclic number.

It is not a de Polignac number, because 1329940949 - 2⁸ = 1329940693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1329940897 and 1329940906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1329940943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664970474 + 664970475.

It is an arithmetic number, because the mean of its divisors is an integer number (664970475).

Almost surely, 2^1329940949 is an apocalyptic number.

It is an amenable number.

1329940949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1329940949 is an equidigital number, since it uses as much as digits as its factorization.

1329940949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 629856, while the sum is 50.

The square root of 1329940949 is about 36468.3554468802. The cubic root of 1329940949 is about 1099.7081729992.

The spelling of 1329940949 in words is "one billion, three hundred twenty-nine million, nine hundred forty thousand, nine hundred forty-nine".