134742389 has 2 divisors, whose sum is σ = 134742390. Its totient is φ = 134742388.

The previous prime is 134742379. The next prime is 134742401. The reversal of 134742389 is 983247431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81306289 + 53436100 = 9017^2 + 7310^2 .

It is an emirp because it is prime and its reverse (983247431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 134742389 - 2⁸ = 134742133 is a prime.

It is a super-2 number, since 2×134742389² = 36311022786854642, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134742329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67371194 + 67371195.

It is an arithmetic number, because the mean of its divisors is an integer number (67371195).

Almost surely, 2^134742389 is an apocalyptic number.

It is an amenable number.

134742389 is a deficient number, since it is larger than the sum of its proper divisors (1).

134742389 is an equidigital number, since it uses as much as digits as its factorization.

134742389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 41.

The square root of 134742389 is about 11607.8589326370. The cubic root of 134742389 is about 512.6662735525. Note that the first 3 decimals are identical.

The spelling of 134742389 in words is "one hundred thirty-four million, seven hundred forty-two thousand, three hundred eighty-nine".