133725779 has 8 divisors (see below), whose sum is σ = 146106288. Its totient is φ = 121382560.

The previous prime is 133725727. The next prime is 133725803. The reversal of 133725779 is 977527331.

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 133725779 - 2⁸ = 133725523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133725379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1532 + ... + 16425.

It is an arithmetic number, because the mean of its divisors is an integer number (18263286).

Almost surely, 2^133725779 is an apocalyptic number.

133725779 is a deficient number, since it is larger than the sum of its proper divisors (12380509).

133725779 is a wasteful number, since it uses less digits than its factorization.

133725779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18645.

The product of its digits is 277830, while the sum is 44.

The square root of 133725779 is about 11563.9862936619. The cubic root of 133725779 is about 511.3736886664.

The spelling of 133725779 in words is "one hundred thirty-three million, seven hundred twenty-five thousand, seven hundred seventy-nine".