1187664798 has 8 divisors (see below), whose sum is σ = 2375329608. Its totient is φ = 395888264.

The previous prime is 1187664769. The next prime is 1187664833. The reversal of 1187664798 is 8974667811.

It is a happy number.

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

1187664798 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98972061 + ... + 98972072.

It is an arithmetic number, because the mean of its divisors is an integer number (296916201).

Almost surely, 2^1187664798 is an apocalyptic number.

1187664798 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1187664798 is a wasteful number, since it uses less digits than its factorization.

1187664798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197944138.

The product of its digits is 4064256, while the sum is 57.

The square root of 1187664798 is about 34462.5129379736. The cubic root of 1187664798 is about 1059.0048801315.

The spelling of 1187664798 in words is "one billion, one hundred eighty-seven million, six hundred sixty-four thousand, seven hundred ninety-eight".