1187079945 has 16 divisors (see below), whose sum is σ = 1900480320. Its totient is φ = 632725184.

The previous prime is 1187079919. The next prime is 1187079977. The reversal of 1187079945 is 5499707811.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1187079945 - 2⁵ = 1187079913 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2482 + ... + 48788.

It is an arithmetic number, because the mean of its divisors is an integer number (118780020).

Almost surely, 2^1187079945 is an apocalyptic number.

1187079945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1187079945 is a deficient number, since it is larger than the sum of its proper divisors (713400375).

1187079945 is a wasteful number, since it uses less digits than its factorization.

1187079945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48024.

The product of its (nonzero) digits is 635040, while the sum is 51.

The square root of 1187079945 is about 34454.0265426263. The cubic root of 1187079945 is about 1058.8310196629.

The spelling of 1187079945 in words is "one billion, one hundred eighty-seven million, seventy-nine thousand, nine hundred forty-five".