133246931 has 4 divisors (see below), whose sum is σ = 133299000. Its totient is φ = 133194864.

The previous prime is 133246913. The next prime is 133246991. The reversal of 133246931 is 139642331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 139642331 = 5381 ⋅25951.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133246931 is a prime.

It is a super-2 number, since 2×133246931² = 35509489241837522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133246991) 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, 21986 + ... + 27383.

It is an arithmetic number, because the mean of its divisors is an integer number (33324750).

Almost surely, 2^133246931 is an apocalyptic number.

133246931 is a deficient number, since it is larger than the sum of its proper divisors (52069).

133246931 is an equidigital number, since it uses as much as digits as its factorization.

133246931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52068.

The product of its digits is 11664, while the sum is 32.

The square root of 133246931 is about 11543.2634467034. The cubic root of 133246931 is about 510.7625795455.

The spelling of 133246931 in words is "one hundred thirty-three million, two hundred forty-six thousand, nine hundred thirty-one".