1118920549 has 4 divisors (see below), whose sum is σ = 1131492780. Its totient is φ = 1106348320.

The previous prime is 1118920519. The next prime is 1118920571. The reversal of 1118920549 is 9450298111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9450298111 = 8467 ⋅1116133.

It can be written as a sum of positive squares in 2 ways, for example, as 547232449 + 571688100 = 23393^2 + 23910^2 .

It is not a de Polignac number, because 1118920549 - 2⁹ = 1118920037 is a prime.

It is a super-2 number, since 2×1118920549² = 2503966389948922802, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118920519) 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, 6285982 + ... + 6286159.

It is an arithmetic number, because the mean of its divisors is an integer number (282873195).

Almost surely, 2^1118920549 is an apocalyptic number.

It is an amenable number.

1118920549 is a deficient number, since it is larger than the sum of its proper divisors (12572231).

1118920549 is an equidigital number, since it uses as much as digits as its factorization.

1118920549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12572230.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 1118920549 is about 33450.2697896444. The cubic root of 1118920549 is about 1038.1650796190.

The spelling of 1118920549 in words is "one billion, one hundred eighteen million, nine hundred twenty thousand, five hundred forty-nine".