133042397 has 4 divisors (see below), whose sum is σ = 133066176. Its totient is φ = 133018620.

The previous prime is 133042381. The next prime is 133042411. The reversal of 133042397 is 793240331.

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 133042397 - 2⁴ = 133042381 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 (133042367) 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, 1622 + ... + 16392.

It is an arithmetic number, because the mean of its divisors is an integer number (33266544).

Almost surely, 2^133042397 is an apocalyptic number.

It is an amenable number.

133042397 is a deficient number, since it is larger than the sum of its proper divisors (23779).

133042397 is an equidigital number, since it uses as much as digits as its factorization.

133042397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23778.

The product of its (nonzero) digits is 13608, while the sum is 32.

The square root of 133042397 is about 11534.4005912748. The cubic root of 133042397 is about 510.5011055758.

The spelling of 133042397 in words is "one hundred thirty-three million, forty-two thousand, three hundred ninety-seven".