1499135909 has 2 divisors, whose sum is σ = 1499135910. Its totient is φ = 1499135908.

The previous prime is 1499135881. The next prime is 1499135941. The reversal of 1499135909 is 9095319941.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1465205284 + 33930625 = 38278^2 + 5825^2 .

It is a cyclic number.

It is not a de Polignac number, because 1499135909 - 2¹² = 1499131813 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1499138909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 749567954 + 749567955.

It is an arithmetic number, because the mean of its divisors is an integer number (749567955).

Almost surely, 2^1499135909 is an apocalyptic number.

It is an amenable number.

1499135909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1499135909 is an equidigital number, since it uses as much as digits as its factorization.

1499135909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 393660, while the sum is 50.

The square root of 1499135909 is about 38718.6764882272. The cubic root of 1499135909 is about 1144.4943920489.

The spelling of 1499135909 in words is "one billion, four hundred ninety-nine million, one hundred thirty-five thousand, nine hundred nine".