1388677969 has 16 divisors (see below), whose sum is σ = 1700828928. Its totient is φ = 1107767232.

The previous prime is 1388677957. The next prime is 1388677973. The reversal of 1388677969 is 9697768831.

It is a cyclic number.

It is not a de Polignac number, because 1388677969 - 2⁵ = 1388677937 is a prime.

It is a super-2 number, since 2×1388677969² = 3856853003171929922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1388677969.

It is not an unprimeable number, because it can be changed into a prime (1388677949) 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, 110602 + ... + 122515.

It is an arithmetic number, because the mean of its divisors is an integer number (106301808).

Almost surely, 2^1388677969 is an apocalyptic number.

It is an amenable number.

1388677969 is a deficient number, since it is larger than the sum of its proper divisors (312150959).

1388677969 is a wasteful number, since it uses less digits than its factorization.

1388677969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233184.

The product of its digits is 27433728, while the sum is 64.

The square root of 1388677969 is about 37264.9697302976. The cubic root of 1388677969 is about 1115.6651019217.

The spelling of 1388677969 in words is "one billion, three hundred eighty-eight million, six hundred seventy-seven thousand, nine hundred sixty-nine".