1187974617 has 16 divisors (see below), whose sum is σ = 1627442880. Its totient is φ = 770522112.

The previous prime is 1187974583. The next prime is 1187974621. The reversal of 1187974617 is 7164797811.

It is not a de Polignac number, because 1187974617 - 2²⁷ = 1053756889 is a prime.

It is a super-2 number, since 2×1187974617² = 2822567381272593378, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1187974617.

It is not an unprimeable number, because it can be changed into a prime (1187975617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17428 + ... + 51765.

It is an arithmetic number, because the mean of its divisors is an integer number (101715180).

Almost surely, 2^1187974617 is an apocalyptic number.

It is an amenable number.

1187974617 is a deficient number, since it is larger than the sum of its proper divisors (439468263).

1187974617 is an equidigital number, since it uses as much as digits as its factorization.

1187974617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69352.

The product of its digits is 592704, while the sum is 51.

The square root of 1187974617 is about 34467.0076594995. The cubic root of 1187974617 is about 1059.0969575448.

The spelling of 1187974617 in words is "one billion, one hundred eighty-seven million, nine hundred seventy-four thousand, six hundred seventeen".