133088731 has 4 divisors (see below), whose sum is σ = 134584200. Its totient is φ = 131593264.

The previous prime is 133088723. The next prime is 133088759. The reversal of 133088731 is 137880331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 137880331 = 23 ⋅5994797.

It is not a de Polignac number, because 133088731 - 2³ = 133088723 is a prime.

It is a super-2 number, since 2×133088731² = 35425220638380722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133088701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 747601 + ... + 747778.

It is an arithmetic number, because the mean of its divisors is an integer number (33646050).

Almost surely, 2^133088731 is an apocalyptic number.

133088731 is a deficient number, since it is larger than the sum of its proper divisors (1495469).

133088731 is an equidigital number, since it uses as much as digits as its factorization.

133088731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1495468.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 133088731 is about 11536.4089299920. The cubic root of 133088731 is about 510.5603619065.

The spelling of 133088731 in words is "one hundred thirty-three million, eighty-eight thousand, seven hundred thirty-one".