13533961 has 4 divisors (see below), whose sum is σ = 15467392. Its totient is φ = 11600532.

The previous prime is 13533929. The next prime is 13533973. The reversal of 13533961 is 16933531.

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.

It is a cyclic number.

It is not a de Polignac number, because 13533961 - 2⁵ = 13533929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13533901) 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, 966705 + ... + 966718.

It is an arithmetic number, because the mean of its divisors is an integer number (3866848).

Almost surely, 2^13533961 is an apocalyptic number.

It is an amenable number.

13533961 is a deficient number, since it is larger than the sum of its proper divisors (1933431).

13533961 is an equidigital number, since it uses as much as digits as its factorization.

13533961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1933430.

The product of its digits is 7290, while the sum is 31.

The square root of 13533961 is about 3678.8532180559. The cubic root of 13533961 is about 238.3096562566.

The spelling of 13533961 in words is "thirteen million, five hundred thirty-three thousand, nine hundred sixty-one".