1188023997 has 8 divisors (see below), whose sum is σ = 1585364544. Its totient is φ = 791349728.

The previous prime is 1188023989. The next prime is 1188023999. The reversal of 1188023997 is 7993208811.

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

It is a cyclic number.

It is not a de Polignac number, because 1188023997 - 2³ = 1188023989 is a prime.

It is a super-2 number, since 2×1188023997² = 2822802034895712018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1188023999) 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, 162393 + ... + 169550.

It is an arithmetic number, because the mean of its divisors is an integer number (198170568).

Almost surely, 2^1188023997 is an apocalyptic number.

It is an amenable number.

1188023997 is a deficient number, since it is larger than the sum of its proper divisors (397340547).

1188023997 is a wasteful number, since it uses less digits than its factorization.

1188023997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333139.

The product of its (nonzero) digits is 217728, while the sum is 48.

The square root of 1188023997 is about 34467.7239892628. The cubic root of 1188023997 is about 1059.1116316751. Note that the first 3 decimals are identical.

The spelling of 1188023997 in words is "one billion, one hundred eighty-eight million, twenty-three thousand, nine hundred ninety-seven".