133661117 has 4 divisors (see below), whose sum is σ = 134245020. Its totient is φ = 133077216.

The previous prime is 133661113. The next prime is 133661147. The reversal of 133661117 is 711166331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 102535876 + 31125241 = 10126^2 + 5579^2 .

It is a cyclic number.

It is not a de Polignac number, because 133661117 - 2² = 133661113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133661117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133661111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 291608 + ... + 292065.

It is an arithmetic number, because the mean of its divisors is an integer number (33561255).

Almost surely, 2^133661117 is an apocalyptic number.

It is an amenable number.

133661117 is a deficient number, since it is larger than the sum of its proper divisors (583903).

133661117 is an equidigital number, since it uses as much as digits as its factorization.

133661117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583902.

The product of its digits is 2268, while the sum is 29.

The square root of 133661117 is about 11561.1901203985. The cubic root of 133661117 is about 511.2912518647.

The spelling of 133661117 in words is "one hundred thirty-three million, six hundred sixty-one thousand, one hundred seventeen".