133973966 has 16 divisors (see below), whose sum is σ = 235877856. Its totient is φ = 55865376.

The previous prime is 133973963. The next prime is 133973969. The reversal of 133973966 is 669379331.

It is an interprime number because it is at equal distance from previous prime (133973963) and next prime (133973969).

It is a self number, because there is not a number n which added to its sum of digits gives 133973966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133973963) 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, 128801 + ... + 129836.

It is an arithmetic number, because the mean of its divisors is an integer number (14742366).

Almost surely, 2^133973966 is an apocalyptic number.

133973966 is a deficient number, since it is larger than the sum of its proper divisors (101903890).

133973966 is a wasteful number, since it uses less digits than its factorization.

133973966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258683.

The product of its digits is 551124, while the sum is 47.

The square root of 133973966 is about 11574.7123506375. The cubic root of 133973966 is about 511.6898527527.

The spelling of 133973966 in words is "one hundred thirty-three million, nine hundred seventy-three thousand, nine hundred sixty-six".