133406457 has 4 divisors (see below), whose sum is σ = 177875280. Its totient is φ = 88937636.

The previous prime is 133406443. The next prime is 133406473. The reversal of 133406457 is 754604331.

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 133406457 - 2¹¹ = 133404409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133406437) 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, 22234407 + ... + 22234412.

It is an arithmetic number, because the mean of its divisors is an integer number (44468820).

Almost surely, 2^133406457 is an apocalyptic number.

It is an amenable number.

133406457 is a deficient number, since it is larger than the sum of its proper divisors (44468823).

133406457 is an equidigital number, since it uses as much as digits as its factorization.

133406457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44468822.

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 133406457 is about 11550.1712974310. The cubic root of 133406457 is about 510.9663301204.

The spelling of 133406457 in words is "one hundred thirty-three million, four hundred six thousand, four hundred fifty-seven".