1311402023 has 4 divisors (see below), whose sum is σ = 1311521088. Its totient is φ = 1311282960.

The previous prime is 1311402019. The next prime is 1311402031. The reversal of 1311402023 is 3202041131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3202041131 = 137 ⋅23372563.

It is a cyclic number.

It is not a de Polignac number, because 1311402023 - 2² = 1311402019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311401992 and 1311402010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311402013) 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, 41111 + ... + 65672.

It is an arithmetic number, because the mean of its divisors is an integer number (327880272).

Almost surely, 2^1311402023 is an apocalyptic number.

1311402023 is a deficient number, since it is larger than the sum of its proper divisors (119065).

1311402023 is a wasteful number, since it uses less digits than its factorization.

1311402023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119064.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1311402023 is about 36213.2851727098. The cubic root of 1311402023 is about 1094.5743911435.

Adding to 1311402023 its reverse (3202041131), we get a palindrome (4513443154).

The spelling of 1311402023 in words is "one billion, three hundred eleven million, four hundred two thousand, twenty-three".