134645993 has 2 divisors, whose sum is σ = 134645994. Its totient is φ = 134645992.

The previous prime is 134645981. The next prime is 134645999. The reversal of 134645993 is 399546431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134629609 + 16384 = 11603^2 + 128^2 .

It is a cyclic number.

It is not a de Polignac number, because 134645993 - 2¹⁸ = 134383849 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (134645999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67322996 + 67322997.

It is an arithmetic number, because the mean of its divisors is an integer number (67322997).

Almost surely, 2^134645993 is an apocalyptic number.

It is an amenable number.

134645993 is a deficient number, since it is larger than the sum of its proper divisors (1).

134645993 is an equidigital number, since it uses as much as digits as its factorization.

134645993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 44.

The square root of 134645993 is about 11603.7060028251. The cubic root of 134645993 is about 512.5439889270.

The spelling of 134645993 in words is "one hundred thirty-four million, six hundred forty-five thousand, nine hundred ninety-three".