133798971 has 4 divisors (see below), whose sum is σ = 178398632. Its totient is φ = 89199312.

The previous prime is 133798967. The next prime is 133798979. The reversal of 133798971 is 179897331.

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

It is not a de Polignac number, because 133798971 - 2² = 133798967 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 133798971.

It is not an unprimeable number, because it can be changed into a prime (133798979) 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, 22299826 + ... + 22299831.

It is an arithmetic number, because the mean of its divisors is an integer number (44599658).

Almost surely, 2^133798971 is an apocalyptic number.

133798971 is a deficient number, since it is larger than the sum of its proper divisors (44599661).

133798971 is an equidigital number, since it uses as much as digits as its factorization.

133798971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44599660.

The product of its digits is 285768, while the sum is 48.

The square root of 133798971 is about 11567.1505134151. The cubic root of 133798971 is about 511.4669682041.

The spelling of 133798971 in words is "one hundred thirty-three million, seven hundred ninety-eight thousand, nine hundred seventy-one".