1111861397 has 4 divisors (see below), whose sum is σ = 1115011500. Its totient is φ = 1108711296.

The previous prime is 1111861351. The next prime is 1111861403. The reversal of 1111861397 is 7931681111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 409293361 + 702568036 = 20231^2 + 26506^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111861397 - 2¹⁴ = 1111845013 is a prime.

It is a super-2 number, since 2×1111861397² = 2472471532277583218, 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 1111861397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111861307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1574522 + ... + 1575227.

It is an arithmetic number, because the mean of its divisors is an integer number (278752875).

Almost surely, 2^1111861397 is an apocalyptic number.

It is an amenable number.

1111861397 is a deficient number, since it is larger than the sum of its proper divisors (3150103).

1111861397 is an equidigital number, since it uses as much as digits as its factorization.

1111861397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3150102.

The product of its digits is 9072, while the sum is 38.

The square root of 1111861397 is about 33344.5857224228. The cubic root of 1111861397 is about 1035.9772474667.

The spelling of 1111861397 in words is "one billion, one hundred eleven million, eight hundred sixty-one thousand, three hundred ninety-seven".