1399122986 has 4 divisors (see below), whose sum is σ = 2098684482. Its totient is φ = 699561492.

The previous prime is 1399122983. The next prime is 1399123021. The reversal of 1399122986 is 6892219931.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1363898761 + 35224225 = 36931^2 + 5935^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1399122983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349780745 + ... + 349780748.

Almost surely, 2^1399122986 is an apocalyptic number.

1399122986 is a deficient number, since it is larger than the sum of its proper divisors (699561496).

1399122986 is an equidigital number, since it uses as much as digits as its factorization.

1399122986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699561495.

The product of its digits is 419904, while the sum is 50.

The square root of 1399122986 is about 37404.8524392224. The cubic root of 1399122986 is about 1118.4552966522.

The spelling of 1399122986 in words is "one billion, three hundred ninety-nine million, one hundred twenty-two thousand, nine hundred eighty-six".