1381736986 has 48 divisors (see below), whose sum is σ = 2465982792. Its totient is φ = 578793600.

The previous prime is 1381736971. The next prime is 1381737001. The reversal of 1381736986 is 6896371831.

It is an interprime number because it is at equal distance from previous prime (1381736971) and next prime (1381737001).

It can be written as a sum of positive squares in 4 ways, for example, as 460917961 + 920819025 = 21469^2 + 30345^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1081380 + ... + 1082656.

Almost surely, 2^1381736986 is an apocalyptic number.

1381736986 is a deficient number, since it is larger than the sum of its proper divisors (1084245806).

1381736986 is a wasteful number, since it uses less digits than its factorization.

1381736986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1535 (or 1528 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 52.

The square root of 1381736986 is about 37171.7229355864. The cubic root of 1381736986 is about 1113.8031990890.

It can be divided in two parts, 138 and 1736986, that added together give a square (1737124 = 1318²).

The spelling of 1381736986 in words is "one billion, three hundred eighty-one million, seven hundred thirty-six thousand, nine hundred eighty-six".