11111913 has 6 divisors (see below), whose sum is σ = 16050554. Its totient is φ = 7407936.

The previous prime is 11111911. The next prime is 11111923. The reversal of 11111913 is 31911111.

It can be written as a sum of positive squares in only one way, i.e., 10323369 + 788544 = 3213^2 + 888^2 .

It is not a de Polignac number, because 11111913 - 2¹ = 11111911 is a prime.

It is a super-2 number, since 2×11111913² = 246949221039138, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (11111911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 617320 + ... + 617337.

Almost surely, 2^11111913 is an apocalyptic number.

It is an amenable number.

11111913 is a deficient number, since it is larger than the sum of its proper divisors (4938641).

11111913 is a wasteful number, since it uses less digits than its factorization.

11111913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234663 (or 1234660 counting only the distinct ones).

The product of its digits is 27, while the sum is 18.

The square root of 11111913 is about 3333.4536144965. The cubic root of 11111913 is about 223.1496846734.

The spelling of 11111913 in words is "eleven million, one hundred eleven thousand, nine hundred thirteen".