133861013 has 32 divisors (see below), whose sum is σ = 164505600. Its totient is φ = 107889600.

The previous prime is 133860983. The next prime is 133861027. The reversal of 133861013 is 310168331.

It is a happy number.

It is not a de Polignac number, because 133861013 - 2¹⁶ = 133795477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133869013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 700748 + ... + 700938.

It is an arithmetic number, because the mean of its divisors is an integer number (5140800).

Almost surely, 2^133861013 is an apocalyptic number.

133861013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

133861013 is a deficient number, since it is larger than the sum of its proper divisors (30644587).

133861013 is a wasteful number, since it uses less digits than its factorization.

133861013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 133861013 is about 11569.8320212525. The cubic root of 133861013 is about 511.5460109898.

The spelling of 133861013 in words is "one hundred thirty-three million, eight hundred sixty-one thousand, thirteen".