1329924961 has 2 divisors, whose sum is σ = 1329924962. Its totient is φ = 1329924960.

The previous prime is 1329924923. The next prime is 1329924983. The reversal of 1329924961 is 1694299231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 974376225 + 355548736 = 31215^2 + 18856^2 .

It is an emirp because it is prime and its reverse (1694299231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1329924961 - 2¹³ = 1329916769 is a prime.

It is not a weakly prime, because it can be changed into another prime (1329922961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664962480 + 664962481.

It is an arithmetic number, because the mean of its divisors is an integer number (664962481).

Almost surely, 2^1329924961 is an apocalyptic number.

It is an amenable number.

1329924961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1329924961 is an equidigital number, since it uses as much as digits as its factorization.

1329924961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 46.

The square root of 1329924961 is about 36468.1362424789. The cubic root of 1329924961 is about 1099.7037662359.

The spelling of 1329924961 in words is "one billion, three hundred twenty-nine million, nine hundred twenty-four thousand, nine hundred sixty-one".