133220779 has 8 divisors (see below), whose sum is σ = 135693792. Its totient is φ = 130764480.

The previous prime is 133220771. The next prime is 133220783. The reversal of 133220779 is 977022331.

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 133220779 - 2³ = 133220771 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (133220771) 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, 12517 + ... + 20569.

It is an arithmetic number, because the mean of its divisors is an integer number (16961724).

Almost surely, 2^133220779 is an apocalyptic number.

133220779 is a deficient number, since it is larger than the sum of its proper divisors (2473013).

133220779 is an equidigital number, since it uses as much as digits as its factorization.

133220779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8357.

The product of its (nonzero) digits is 15876, while the sum is 34.

The square root of 133220779 is about 11542.1306092073. The cubic root of 133220779 is about 510.7291620480.

The spelling of 133220779 in words is "one hundred thirty-three million, two hundred twenty thousand, seven hundred seventy-nine".