133871013 has 12 divisors (see below), whose sum is σ = 194651808. Its totient is φ = 88655400.

The previous prime is 133870973. The next prime is 133871021. The reversal of 133871013 is 310178331.

It is not a de Polignac number, because 133871013 - 2⁹ = 133870501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133871813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47895 + ... + 50612.

It is an arithmetic number, because the mean of its divisors is an integer number (16220984).

Almost surely, 2^133871013 is an apocalyptic number.

It is an amenable number.

133871013 is a deficient number, since it is larger than the sum of its proper divisors (60780795).

133871013 is a wasteful number, since it uses less digits than its factorization.

133871013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98664 (or 98661 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 133871013 is about 11570.2641715736. The cubic root of 133871013 is about 511.5587489101.

It can be divided in two parts, 13387 and 1013, that added together give a square (14400 = 120²).

The spelling of 133871013 in words is "one hundred thirty-three million, eight hundred seventy-one thousand, thirteen".