1398969117 has 64 divisors (see below), whose sum is σ = 2700956160. Its totient is φ = 694490112.

The previous prime is 1398969113. The next prime is 1398969127. The reversal of 1398969117 is 7119698931.

It is a happy number.

It is not a de Polignac number, because 1398969117 - 2² = 1398969113 is a prime.

It is a super-2 number, since 2×1398969117² = 3914229180639519378, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398969113) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25023 + ... + 58515.

It is an arithmetic number, because the mean of its divisors is an integer number (42202440).

Almost surely, 2^1398969117 is an apocalyptic number.

1398969117 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1398969117 is a deficient number, since it is larger than the sum of its proper divisors (1301987043).

1398969117 is a wasteful number, since it uses less digits than its factorization.

1398969117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33539 (or 33533 counting only the distinct ones).

The product of its digits is 734832, while the sum is 54.

The square root of 1398969117 is about 37402.7955773362. The cubic root of 1398969117 is about 1118.4142943222.

The spelling of 1398969117 in words is "one billion, three hundred ninety-eight million, nine hundred sixty-nine thousand, one hundred seventeen".