1311984097 has 4 divisors (see below), whose sum is σ = 1312229376. Its totient is φ = 1311738820.

The previous prime is 1311984053. The next prime is 1311984103. The reversal of 1311984097 is 7904891131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311984097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311984007) 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, 114433 + ... + 125374.

It is an arithmetic number, because the mean of its divisors is an integer number (328057344).

Almost surely, 2^1311984097 is an apocalyptic number.

It is an amenable number.

1311984097 is a deficient number, since it is larger than the sum of its proper divisors (245279).

1311984097 is an equidigital number, since it uses as much as digits as its factorization.

1311984097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245278.

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 1311984097 is about 36221.3210278145. The cubic root of 1311984097 is about 1094.7363117554.

The spelling of 1311984097 in words is "one billion, three hundred eleven million, nine hundred eighty-four thousand, ninety-seven".