1391248827 has 6 divisors (see below), whose sum is σ = 2009581652. Its totient is φ = 927499212.

The previous prime is 1391248759. The next prime is 1391248849. The reversal of 1391248827 is 7288421931.

It is a happy number.

1391248827 is a `hidden beast` number, since 139 + 12 + 488 + 27 = 666.

It is not a de Polignac number, because 1391248827 - 2¹⁴ = 1391232443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1391248867) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77291593 + ... + 77291610.

Almost surely, 2^1391248827 is an apocalyptic number.

1391248827 is a deficient number, since it is larger than the sum of its proper divisors (618332825).

1391248827 is a wasteful number, since it uses less digits than its factorization.

1391248827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154583209 (or 154583206 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 1391248827 is about 37299.4480790266. The cubic root of 1391248827 is about 1116.3531540257.

The spelling of 1391248827 in words is "one billion, three hundred ninety-one million, two hundred forty-eight thousand, eight hundred twenty-seven".