133679749 has 8 divisors (see below), whose sum is σ = 159419520. Its totient is φ = 109600656.

The previous prime is 133679737. The next prime is 133679759. The reversal of 133679749 is 947976331.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133679749 - 2¹¹ = 133677701 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 (133679729) 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 7 ways as a sum of consecutive naturals, for example, 414994 + ... + 415315.

It is an arithmetic number, because the mean of its divisors is an integer number (19927440).

Almost surely, 2^133679749 is an apocalyptic number.

It is an amenable number.

133679749 is a deficient number, since it is larger than the sum of its proper divisors (25739771).

133679749 is an equidigital number, since it uses as much as digits as its factorization.

133679749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830339.

The product of its digits is 857304, while the sum is 49.

The square root of 133679749 is about 11561.9958917135. The cubic root of 133679749 is about 511.3150083024.

The spelling of 133679749 in words is "one hundred thirty-three million, six hundred seventy-nine thousand, seven hundred forty-nine".