1391969485 has 8 divisors (see below), whose sum is σ = 1670577120. Its totient is φ = 1113433104.

The previous prime is 1391969483. The next prime is 1391969519. The reversal of 1391969485 is 5849691931.

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

It is a cyclic number.

It is not a de Polignac number, because 1391969485 - 2¹ = 1391969483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391969483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45874 + ... + 69916.

It is an arithmetic number, because the mean of its divisors is an integer number (208822140).

Almost surely, 2^1391969485 is an apocalyptic number.

It is an amenable number.

1391969485 is a deficient number, since it is larger than the sum of its proper divisors (278607635).

1391969485 is a wasteful number, since it uses less digits than its factorization.

1391969485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35627.

The product of its digits is 2099520, while the sum is 55.

The square root of 1391969485 is about 37309.1072661890. The cubic root of 1391969485 is about 1116.5458753529.

The spelling of 1391969485 in words is "one billion, three hundred ninety-one million, nine hundred sixty-nine thousand, four hundred eighty-five".