1118512397 has 4 divisors (see below), whose sum is σ = 1157081820. Its totient is φ = 1079942976.

The previous prime is 1118512391. The next prime is 1118512403. The reversal of 1118512397 is 7932158111.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (1118512391) and next prime (1118512403).

It can be written as a sum of positive squares in 2 ways, for example, as 782376841 + 336135556 = 27971^2 + 18334^2 .

It is a cyclic number.

It is not a de Polignac number, because 1118512397 - 2¹⁴ = 1118496013 is a prime.

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 1118512397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118512391) 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 3 ways as a sum of consecutive naturals, for example, 19284668 + ... + 19284725.

It is an arithmetic number, because the mean of its divisors is an integer number (289270455).

Almost surely, 2^1118512397 is an apocalyptic number.

It is an amenable number.

1118512397 is a deficient number, since it is larger than the sum of its proper divisors (38569423).

1118512397 is an equidigital number, since it uses as much as digits as its factorization.

1118512397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38569422.

The product of its digits is 15120, while the sum is 38.

The square root of 1118512397 is about 33444.1683556341. The cubic root of 1118512397 is about 1038.0388327387.

The spelling of 1118512397 in words is "one billion, one hundred eighteen million, five hundred twelve thousand, three hundred ninety-seven".