1499781317 has 2 divisors, whose sum is σ = 1499781318. Its totient is φ = 1499781316.

The previous prime is 1499781307. The next prime is 1499781329. The reversal of 1499781317 is 7131879941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 868716676 + 631064641 = 29474^2 + 25121^2 .

It is an emirp because it is prime and its reverse (7131879941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1499781317 - 2⁶ = 1499781253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1499781307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 749890658 + 749890659.

It is an arithmetic number, because the mean of its divisors is an integer number (749890659).

Almost surely, 2^1499781317 is an apocalyptic number.

It is an amenable number.

1499781317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1499781317 is an equidigital number, since it uses as much as digits as its factorization.

1499781317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 50.

The square root of 1499781317 is about 38727.0101737792. The cubic root of 1499781317 is about 1144.6586110621.

The spelling of 1499781317 in words is "one billion, four hundred ninety-nine million, seven hundred eighty-one thousand, three hundred seventeen".