1229487869 has 16 divisors (see below), whose sum is σ = 1306905600. Its totient is φ = 1154736000.

The previous prime is 1229487859. The next prime is 1229487871. The reversal of 1229487869 is 9687849221.

It is a cyclic number.

It is not a de Polignac number, because 1229487869 - 2¹⁶ = 1229422333 is a prime.

It is a super-2 number, since 2×1229487869² = 3023280840036322322, 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 (1229487829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 250499 + ... + 255359.

It is an arithmetic number, because the mean of its divisors is an integer number (81681600).

Almost surely, 2^1229487869 is an apocalyptic number.

It is an amenable number.

1229487869 is a deficient number, since it is larger than the sum of its proper divisors (77417731).

1229487869 is a wasteful number, since it uses less digits than its factorization.

1229487869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5132.

The product of its digits is 3483648, while the sum is 56.

The square root of 1229487869 is about 35064.0538015786. The cubic root of 1229487869 is about 1071.2925449042.

The spelling of 1229487869 in words is "one billion, two hundred twenty-nine million, four hundred eighty-seven thousand, eight hundred sixty-nine".