13440379 has 2 divisors, whose sum is σ = 13440380. Its totient is φ = 13440378.

The previous prime is 13440341. The next prime is 13440389. The reversal of 13440379 is 97304431.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13440379 is a prime.

It is equal to p₈₇₆₀₄₆ and since 13440379 and 876046 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13440379.

It is not a weakly prime, because it can be changed into another prime (13440389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6720189 + 6720190.

It is an arithmetic number, because the mean of its divisors is an integer number (6720190).

Almost surely, 2^13440379 is an apocalyptic number.

13440379 is a deficient number, since it is larger than the sum of its proper divisors (1).

13440379 is an equidigital number, since it uses as much as digits as its factorization.

13440379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 13440379 is about 3666.1122459630. The cubic root of 13440379 is about 237.7591129570.

The spelling of 13440379 in words is "thirteen million, four hundred forty thousand, three hundred seventy-nine".