1249829669 has 4 divisors (see below), whose sum is σ = 1363450560. Its totient is φ = 1136208780.

The previous prime is 1249829663. The next prime is 1249829689. The reversal of 1249829669 is 9669289421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9669289421 = 11 ⋅879026311.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1249829669 is a prime.

It is a super-2 number, since 2×1249829669² = 3124148403025299122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249829663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56810429 + ... + 56810450.

It is an arithmetic number, because the mean of its divisors is an integer number (340862640).

Almost surely, 2^1249829669 is an apocalyptic number.

It is an amenable number.

1249829669 is a deficient number, since it is larger than the sum of its proper divisors (113620891).

1249829669 is a wasteful number, since it uses less digits than its factorization.

1249829669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113620890.

The product of its digits is 3359232, while the sum is 56.

The square root of 1249829669 is about 35352.9301331587. The cubic root of 1249829669 is about 1077.1684138580.

The spelling of 1249829669 in words is "one billion, two hundred forty-nine million, eight hundred twenty-nine thousand, six hundred sixty-nine".