133713891 has 24 divisors (see below), whose sum is σ = 207870624. Its totient is φ = 82517760.

The previous prime is 133713889. The next prime is 133713901. The reversal of 133713891 is 198317331.

It is not a de Polignac number, because 133713891 - 2¹ = 133713889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133713491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2170 + ... + 16496.

It is an arithmetic number, because the mean of its divisors is an integer number (8661276).

Almost surely, 2^133713891 is an apocalyptic number.

133713891 is a deficient number, since it is larger than the sum of its proper divisors (74156733).

133713891 is a wasteful number, since it uses less digits than its factorization.

133713891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14411 (or 14408 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 133713891 is about 11563.4722726351. The cubic root of 133713891 is about 511.3585347930.

The spelling of 133713891 in words is "one hundred thirty-three million, seven hundred thirteen thousand, eight hundred ninety-one".