13435993 has 4 divisors (see below), whose sum is σ = 13454500. Its totient is φ = 13417488.

The previous prime is 13435963. The next prime is 13435997. The reversal of 13435993 is 39953431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3968064 + 9467929 = 1992^2 + 3077^2 .

It is a cyclic number.

It is not a de Polignac number, because 13435993 - 2⁹ = 13435481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13435997) 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, 8118 + ... + 9631.

It is an arithmetic number, because the mean of its divisors is an integer number (3363625).

Almost surely, 2^13435993 is an apocalyptic number.

It is an amenable number.

13435993 is a deficient number, since it is larger than the sum of its proper divisors (18507).

13435993 is an equidigital number, since it uses as much as digits as its factorization.

13435993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18506.

The product of its digits is 43740, while the sum is 37.

The square root of 13435993 is about 3665.5140157964. The cubic root of 13435993 is about 237.7332474928.

The spelling of 13435993 in words is "thirteen million, four hundred thirty-five thousand, nine hundred ninety-three".