133953397 has 4 divisors (see below), whose sum is σ = 134701920. Its totient is φ = 133204876.

The previous prime is 133953361. The next prime is 133953409. The reversal of 133953397 is 793359331.

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 a de Polignac number, because none of the positive numbers 2^k-133953397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133953307) 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, 373993 + ... + 374350.

It is an arithmetic number, because the mean of its divisors is an integer number (33675480).

Almost surely, 2^133953397 is an apocalyptic number.

It is an amenable number.

133953397 is a deficient number, since it is larger than the sum of its proper divisors (748523).

133953397 is an equidigital number, since it uses as much as digits as its factorization.

133953397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748522.

The product of its digits is 229635, while the sum is 43.

The square root of 133953397 is about 11573.8237847308. The cubic root of 133953397 is about 511.6636648606.

The spelling of 133953397 in words is "one hundred thirty-three million, nine hundred fifty-three thousand, three hundred ninety-seven".