1311849473 has 4 divisors (see below), whose sum is σ = 1431108528. Its totient is φ = 1192590420.

The previous prime is 1311849449. The next prime is 1311849479. The reversal of 1311849473 is 3749481131.

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 not a de Polignac number, because 1311849473 - 2¹² = 1311845377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1311849473.

It is not an unprimeable number, because it can be changed into a prime (1311849479) 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, 59629511 + ... + 59629532.

It is an arithmetic number, because the mean of its divisors is an integer number (357777132).

Almost surely, 2^1311849473 is an apocalyptic number.

It is an amenable number.

1311849473 is a deficient number, since it is larger than the sum of its proper divisors (119259055).

1311849473 is a wasteful number, since it uses less digits than its factorization.

1311849473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119259054.

The product of its digits is 72576, while the sum is 41.

The square root of 1311849473 is about 36219.4626271567. The cubic root of 1311849473 is about 1094.6988664787.

The spelling of 1311849473 in words is "one billion, three hundred eleven million, eight hundred forty-nine thousand, four hundred seventy-three".