133752197 has 4 divisors (see below), whose sum is σ = 138066816. Its totient is φ = 129437580.

The previous prime is 133752193. The next prime is 133752221. The reversal of 133752197 is 791257331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 133752197 - 2² = 133752193 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 133752197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133752193) 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, 2157263 + ... + 2157324.

It is an arithmetic number, because the mean of its divisors is an integer number (34516704).

Almost surely, 2^133752197 is an apocalyptic number.

It is an amenable number.

133752197 is a deficient number, since it is larger than the sum of its proper divisors (4314619).

133752197 is an equidigital number, since it uses as much as digits as its factorization.

133752197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4314618.

The product of its digits is 39690, while the sum is 38.

The square root of 133752197 is about 11565.1284904233. The cubic root of 133752197 is about 511.4073610086.

The spelling of 133752197 in words is "one hundred thirty-three million, seven hundred fifty-two thousand, one hundred ninety-seven".