1187870983 has 16 divisors (see below), whose sum is σ = 1313728416. Its totient is φ = 1067074560.

The previous prime is 1187870953. The next prime is 1187870987. The reversal of 1187870983 is 3890787811.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1187870983 is a prime.

It is a super-2 number, since 2×1187870983² = 2822074944506772578, 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 1187870983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1187870987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228216 + ... + 233362.

It is an arithmetic number, because the mean of its divisors is an integer number (82108026).

Almost surely, 2^1187870983 is an apocalyptic number.

1187870983 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1187870983 is a deficient number, since it is larger than the sum of its proper divisors (125857433).

1187870983 is a wasteful number, since it uses less digits than its factorization.

1187870983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5634.

The product of its (nonzero) digits is 677376, while the sum is 52.

The square root of 1187870983 is about 34465.5042470004. The cubic root of 1187870983 is about 1059.0661595675.

The spelling of 1187870983 in words is "one billion, one hundred eighty-seven million, eight hundred seventy thousand, nine hundred eighty-three".