1329149249 has 4 divisors (see below), whose sum is σ = 1330156740. Its totient is φ = 1328141760.

The previous prime is 1329149243. The next prime is 1329149287. The reversal of 1329149249 is 9429419231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 983449600 + 345699649 = 31360^2 + 18593^2 .

It is a cyclic number.

It is not a de Polignac number, because 1329149249 - 2⁸ = 1329148993 is a prime.

It is a super-2 number, since 2×1329149249² = 3533275452234528002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1329149243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 501764 + ... + 504405.

It is an arithmetic number, because the mean of its divisors is an integer number (332539185).

Almost surely, 2^1329149249 is an apocalyptic number.

It is an amenable number.

1329149249 is a deficient number, since it is larger than the sum of its proper divisors (1007491).

1329149249 is a wasteful number, since it uses less digits than its factorization.

1329149249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007490.

The product of its digits is 139968, while the sum is 44.

The square root of 1329149249 is about 36457.4992148392. The cubic root of 1329149249 is about 1099.4899147426.

The spelling of 1329149249 in words is "one billion, three hundred twenty-nine million, one hundred forty-nine thousand, two hundred forty-nine".