1397286706 has 8 divisors (see below), whose sum is σ = 2097144684. Its totient is φ = 698238480.

The previous prime is 1397286691. The next prime is 1397286707. The reversal of 1397286706 is 6076827931.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1318343481 + 78943225 = 36309^2 + 8885^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 1397286706.

It is not an unprimeable number, because it can be changed into a prime (1397286707) 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, 198105 + ... + 205036.

Almost surely, 2^1397286706 is an apocalyptic number.

1397286706 is a deficient number, since it is larger than the sum of its proper divisors (699857978).

1397286706 is a wasteful number, since it uses less digits than its factorization.

1397286706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404876.

The product of its (nonzero) digits is 762048, while the sum is 49.

The square root of 1397286706 is about 37380.2983669205. The cubic root of 1397286706 is about 1117.9657766050.

The spelling of 1397286706 in words is "one billion, three hundred ninety-seven million, two hundred eighty-six thousand, seven hundred six".