1499781329 has 2 divisors, whose sum is σ = 1499781330. Its totient is φ = 1499781328.

The previous prime is 1499781317. The next prime is 1499781337. The reversal of 1499781329 is 9231879941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 826275025 + 673506304 = 28745^2 + 25952^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1499781329 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1499781389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 749890664 + 749890665.

It is an arithmetic number, because the mean of its divisors is an integer number (749890665).

Almost surely, 2^1499781329 is an apocalyptic number.

It is an amenable number.

1499781329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1499781329 is an equidigital number, since it uses as much as digits as its factorization.

1499781329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 53.

The square root of 1499781329 is about 38727.0103287099. The cubic root of 1499781329 is about 1144.6586141149.

The spelling of 1499781329 in words is "one billion, four hundred ninety-nine million, seven hundred eighty-one thousand, three hundred twenty-nine".