1311956079 has 16 divisors (see below), whose sum is σ = 2116770048. Its totient is φ = 705589632.

The previous prime is 1311956077. The next prime is 1311956141. The reversal of 1311956079 is 9706591131.

It is not a de Polignac number, because 1311956079 - 2¹ = 1311956077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1311956079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311956071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1837117 + ... + 1837830.

It is an arithmetic number, because the mean of its divisors is an integer number (132298128).

Almost surely, 2^1311956079 is an apocalyptic number.

1311956079 is a deficient number, since it is larger than the sum of its proper divisors (804813969).

1311956079 is a wasteful number, since it uses less digits than its factorization.

1311956079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3674974.

The product of its (nonzero) digits is 51030, while the sum is 42.

The square root of 1311956079 is about 36220.9342645935. The cubic root of 1311956079 is about 1094.7285188407.

The spelling of 1311956079 in words is "one billion, three hundred eleven million, nine hundred fifty-six thousand, seventy-nine".