1321544947 has 8 divisors (see below), whose sum is σ = 1360820736. Its totient is φ = 1282456512.

The previous prime is 1321544941. The next prime is 1321544957. The reversal of 1321544947 is 7494451231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321544947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321544941) 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, 32458 + ... + 60799.

It is an arithmetic number, because the mean of its divisors is an integer number (170102592).

Almost surely, 2^1321544947 is an apocalyptic number.

1321544947 is a deficient number, since it is larger than the sum of its proper divisors (39275789).

1321544947 is an equidigital number, since it uses as much as digits as its factorization.

1321544947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93677.

The product of its digits is 120960, while the sum is 40.

The square root of 1321544947 is about 36353.0596649030. The cubic root of 1321544947 is about 1097.3891100648.

The spelling of 1321544947 in words is "one billion, three hundred twenty-one million, five hundred forty-four thousand, nine hundred forty-seven".