1139198986 has 8 divisors (see below), whose sum is σ = 1711417284. Its totient is φ = 568726560.

The previous prime is 1139198971. The next prime is 1139198989. The reversal of 1139198986 is 6898919311.

It can be written as a sum of positive squares in 2 ways, for example, as 1136027025 + 3171961 = 33705^2 + 1781^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1139198989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 434835 + ... + 437446.

Almost surely, 2^1139198986 is an apocalyptic number.

1139198986 is a deficient number, since it is larger than the sum of its proper divisors (572218298).

1139198986 is an equidigital number, since it uses as much as digits as its factorization.

1139198986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872936.

The product of its digits is 839808, while the sum is 55.

The square root of 1139198986 is about 33752.0219542474. The cubic root of 1139198986 is about 1044.3991986142.

The spelling of 1139198986 in words is "one billion, one hundred thirty-nine million, one hundred ninety-eight thousand, nine hundred eighty-six".