1309913 has 4 divisors (see below), whose sum is σ = 1429008. Its totient is φ = 1190820.

The previous prime is 1309907. The next prime is 1309921. The reversal of 1309913 is 3199031.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3199031 = 11 ⋅290821.

It is a cyclic number.

It is not a de Polignac number, because 1309913 - 2⁶ = 1309849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1309963) 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, 59531 + ... + 59552.

It is an arithmetic number, because the mean of its divisors is an integer number (357252).

2^1309913 is an apocalyptic number.

It is an amenable number.

1309913 is a deficient number, since it is larger than the sum of its proper divisors (119095).

1309913 is a wasteful number, since it uses less digits than its factorization.

1309913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119094.

The product of its (nonzero) digits is 729, while the sum is 26.

The square root of 1309913 is about 1144.5143074685. The cubic root of 1309913 is about 109.4159958429.

It can be divided in two parts, 1309 and 913, that added together give a palindrome (2222).

The spelling of 1309913 in words is "one million, three hundred nine thousand, nine hundred thirteen".