1118147997 has 8 divisors (see below), whose sum is σ = 1493621920. Its totient is φ = 744053040.

The previous prime is 1118147993. The next prime is 1118148007. The reversal of 1118147997 is 7997418111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1118147997 - 2² = 1118147993 is a prime.

It is a super-2 number, since 2×1118147997² = 2500509886390224018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118147993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342847 + ... + 346092.

It is an arithmetic number, because the mean of its divisors is an integer number (186702740).

Almost surely, 2^1118147997 is an apocalyptic number.

It is an amenable number.

1118147997 is a deficient number, since it is larger than the sum of its proper divisors (375473923).

1118147997 is an equidigital number, since it uses as much as digits as its factorization.

1118147997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689483.

The product of its digits is 127008, while the sum is 48.

The square root of 1118147997 is about 33438.7200263407. The cubic root of 1118147997 is about 1037.9260929852.

The spelling of 1118147997 in words is "one billion, one hundred eighteen million, one hundred forty-seven thousand, nine hundred ninety-seven".