134891231 has 2 divisors, whose sum is σ = 134891232. Its totient is φ = 134891230.

The previous prime is 134891221. The next prime is 134891249. The reversal of 134891231 is 132198431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 134891231 - 2¹⁴ = 134874847 is a prime.

It is a super-2 number, since 2×134891231² = 36391288401390722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134891221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67445615 + 67445616.

It is an arithmetic number, because the mean of its divisors is an integer number (67445616).

Almost surely, 2^134891231 is an apocalyptic number.

134891231 is a deficient number, since it is larger than the sum of its proper divisors (1).

134891231 is an equidigital number, since it uses as much as digits as its factorization.

134891231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 134891231 is about 11614.2684229356. The cubic root of 134891231 is about 512.8549748569.

The spelling of 134891231 in words is "one hundred thirty-four million, eight hundred ninety-one thousand, two hundred thirty-one".