133463893 has 4 divisors (see below), whose sum is σ = 134438220. Its totient is φ = 132489568.

The previous prime is 133463881. The next prime is 133463899. The reversal of 133463893 is 398364331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 398364331 = 1579 ⋅252289.

It can be written as a sum of positive squares in 2 ways, for example, as 51868804 + 81595089 = 7202^2 + 9033^2 .

It is a cyclic number.

It is not a de Polignac number, because 133463893 - 2²⁵ = 99909461 is a prime.

It is a super-2 number, since 2×133463893² = 35625221469430898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133463899) 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, 486958 + ... + 487231.

It is an arithmetic number, because the mean of its divisors is an integer number (33609555).

Almost surely, 2^133463893 is an apocalyptic number.

It is an amenable number.

133463893 is a deficient number, since it is larger than the sum of its proper divisors (974327).

133463893 is an equidigital number, since it uses as much as digits as its factorization.

133463893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974326.

The product of its digits is 139968, while the sum is 40.

The square root of 133463893 is about 11552.6573999232. The cubic root of 133463893 is about 511.0396490388.

The spelling of 133463893 in words is "one hundred thirty-three million, four hundred sixty-three thousand, eight hundred ninety-three".