1269948889 has 16 divisors (see below), whose sum is σ = 1438715520. Its totient is φ = 1110376960.

The previous prime is 1269948853. The next prime is 1269948893. The reversal of 1269948889 is 9888499621.

It is not a de Polignac number, because 1269948889 - 2⁷ = 1269948761 is a prime.

It is a super-2 number, since 2×1269948889² = 3225540361344668642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1269948889.

It is not an unprimeable number, because it can be changed into a prime (1269948829) 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 15 ways as a sum of consecutive naturals, for example, 76329 + ... + 91465.

It is an arithmetic number, because the mean of its divisors is an integer number (89919720).

Almost surely, 2^1269948889 is an apocalyptic number.

It is an amenable number.

1269948889 is a deficient number, since it is larger than the sum of its proper divisors (168766631).

1269948889 is a wasteful number, since it uses less digits than its factorization.

1269948889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15440.

The product of its digits is 17915904, while the sum is 64.

The square root of 1269948889 is about 35636.3422505734. The cubic root of 1269948889 is about 1082.9176051452.

The spelling of 1269948889 in words is "one billion, two hundred sixty-nine million, nine hundred forty-eight thousand, eight hundred eighty-nine".