134579381 has 2 divisors, whose sum is σ = 134579382. Its totient is φ = 134579380.

The previous prime is 134579363. The next prime is 134579443. The reversal of 134579381 is 183975431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120253156 + 14326225 = 10966^2 + 3785^2 .

It is an emirp because it is prime and its reverse (183975431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 134579381 - 2⁶ = 134579317 is a prime.

It is a super-2 number, since 2×134579381² = 36223219580686322, 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 (134579321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67289690 + 67289691.

It is an arithmetic number, because the mean of its divisors is an integer number (67289691).

Almost surely, 2^134579381 is an apocalyptic number.

It is an amenable number.

134579381 is a deficient number, since it is larger than the sum of its proper divisors (1).

134579381 is an equidigital number, since it uses as much as digits as its factorization.

134579381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 134579381 is about 11600.8353578525. The cubic root of 134579381 is about 512.4594531475.

The spelling of 134579381 in words is "one hundred thirty-four million, five hundred seventy-nine thousand, three hundred eighty-one".