1391147427 has 8 divisors (see below), whose sum is σ = 1855278864. Its totient is φ = 927223808.

The previous prime is 1391147411. The next prime is 1391147431. The reversal of 1391147427 is 7247411931.

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 1391147427 - 2⁴ = 1391147411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1391147627) 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 7 ways as a sum of consecutive naturals, for example, 35598 + ... + 63635.

It is an arithmetic number, because the mean of its divisors is an integer number (231909858).

Almost surely, 2^1391147427 is an apocalyptic number.

1391147427 is a deficient number, since it is larger than the sum of its proper divisors (464131437).

1391147427 is an equidigital number, since it uses as much as digits as its factorization.

1391147427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103909.

The product of its digits is 42336, while the sum is 39.

The square root of 1391147427 is about 37298.0887848158. The cubic root of 1391147427 is about 1116.3260318801.

The spelling of 1391147427 in words is "one billion, three hundred ninety-one million, one hundred forty-seven thousand, four hundred twenty-seven".