1396865971 has 4 divisors (see below), whose sum is σ = 1400200200. Its totient is φ = 1393531744.

The previous prime is 1396865917. The next prime is 1396866001. The reversal of 1396865971 is 1795686931.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1396865971 - 2¹³ = 1396857779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1396865671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1666486 + ... + 1667323.

It is an arithmetic number, because the mean of its divisors is an integer number (350050050).

Almost surely, 2^1396865971 is an apocalyptic number.

1396865971 is a deficient number, since it is larger than the sum of its proper divisors (3334229).

1396865971 is an equidigital number, since it uses as much as digits as its factorization.

1396865971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3334228.

The product of its digits is 2449440, while the sum is 55.

The square root of 1396865971 is about 37374.6701791467. The cubic root of 1396865971 is about 1117.8535556491.

The spelling of 1396865971 in words is "one billion, three hundred ninety-six million, eight hundred sixty-five thousand, nine hundred seventy-one".