1447139747 has 4 divisors (see below), whose sum is σ = 1452905496. Its totient is φ = 1441374000.

The previous prime is 1447139723. The next prime is 1447139753. The reversal of 1447139747 is 7479317441.

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 1447139747 - 2³⁰ = 373397923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1447139347) 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, 2882498 + ... + 2882999.

It is an arithmetic number, because the mean of its divisors is an integer number (363226374).

Almost surely, 2^1447139747 is an apocalyptic number.

1447139747 is a deficient number, since it is larger than the sum of its proper divisors (5765749).

1447139747 is an equidigital number, since it uses as much as digits as its factorization.

1447139747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5765748.

The product of its digits is 592704, while the sum is 47.

The square root of 1447139747 is about 38041.2900280734. The cubic root of 1447139747 is about 1131.1064806094.

The spelling of 1447139747 in words is "one billion, four hundred forty-seven million, one hundred thirty-nine thousand, seven hundred forty-seven".