13805434 has 4 divisors (see below), whose sum is σ = 20708154. Its totient is φ = 6902716.

The previous prime is 13805431. The next prime is 13805437. The reversal of 13805434 is 43450831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43450831 = 53 ⋅819827.

It is an interprime number because it is at equal distance from previous prime (13805431) and next prime (13805437).

It can be written as a sum of positive squares in only one way, i.e., 12709225 + 1096209 = 3565^2 + 1047^2 .

It is a super-3 number, since 3×13805434³ (a number of 22 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (13805431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3451357 + ... + 3451360.

Almost surely, 2^13805434 is an apocalyptic number.

13805434 is a deficient number, since it is larger than the sum of its proper divisors (6902720).

13805434 is an equidigital number, since it uses as much as digits as its factorization.

13805434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6902719.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 13805434 is about 3715.5664440298. The cubic root of 13805434 is about 239.8925097352.

The spelling of 13805434 in words is "thirteen million, eight hundred five thousand, four hundred thirty-four".