133081749 has 12 divisors (see below), whose sum is σ = 200587296. Its totient is φ = 84863592.

The previous prime is 133081699. The next prime is 133081759. The reversal of 133081749 is 947180331.

It is a happy number.

It is not a de Polignac number, because 133081749 - 2⁷ = 133081621 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133081759) 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 11 ways as a sum of consecutive naturals, for example, 321247 + ... + 321660.

It is an arithmetic number, because the mean of its divisors is an integer number (16715608).

Almost surely, 2^133081749 is an apocalyptic number.

It is an amenable number.

133081749 is a deficient number, since it is larger than the sum of its proper divisors (67505547).

133081749 is a wasteful number, since it uses less digits than its factorization.

133081749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642936 (or 642933 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 133081749 is about 11536.1063188582. The cubic root of 133081749 is about 510.5514335403.

The spelling of 133081749 in words is "one hundred thirty-three million, eighty-one thousand, seven hundred forty-nine".