1247323047 has 4 divisors (see below), whose sum is σ = 1663097400. Its totient is φ = 831548696.

The previous prime is 1247323043. The next prime is 1247323061. The reversal of 1247323047 is 7403237421.

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 1247323047 - 2² = 1247323043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1247322999 and 1247323017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247323043) 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, 207887172 + ... + 207887177.

It is an arithmetic number, because the mean of its divisors is an integer number (415774350).

Almost surely, 2^1247323047 is an apocalyptic number.

1247323047 is a deficient number, since it is larger than the sum of its proper divisors (415774353).

1247323047 is an equidigital number, since it uses as much as digits as its factorization.

1247323047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415774352.

The product of its (nonzero) digits is 28224, while the sum is 33.

The square root of 1247323047 is about 35317.4609364830. The cubic root of 1247323047 is about 1076.4478193709.

The spelling of 1247323047 in words is "one billion, two hundred forty-seven million, three hundred twenty-three thousand, forty-seven".