1391409147 has 4 divisors (see below), whose sum is σ = 1855212200. Its totient is φ = 927606096.

The previous prime is 1391409137. The next prime is 1391409209. The reversal of 1391409147 is 7419041931.

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

It is not a de Polignac number, because 1391409147 - 2⁸ = 1391408891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1391409137) 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, 231901522 + ... + 231901527.

It is an arithmetic number, because the mean of its divisors is an integer number (463803050).

Almost surely, 2^1391409147 is an apocalyptic number.

1391409147 is a deficient number, since it is larger than the sum of its proper divisors (463803053).

1391409147 is an equidigital number, since it uses as much as digits as its factorization.

1391409147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463803052.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 1391409147 is about 37301.5971105796. The cubic root of 1391409147 is about 1116.3960332146.

The spelling of 1391409147 in words is "one billion, three hundred ninety-one million, four hundred nine thousand, one hundred forty-seven".