134993921 has 2 divisors, whose sum is σ = 134993922. Its totient is φ = 134993920.

The previous prime is 134993893. The next prime is 134993951. The reversal of 134993921 is 129399431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111091600 + 23902321 = 10540^2 + 4889^2 .

It is a cyclic number.

It is not a de Polignac number, because 134993921 - 2²⁶ = 67885057 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 (134993951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67496960 + 67496961.

It is an arithmetic number, because the mean of its divisors is an integer number (67496961).

Almost surely, 2^134993921 is an apocalyptic number.

It is an amenable number.

134993921 is a deficient number, since it is larger than the sum of its proper divisors (1).

134993921 is an equidigital number, since it uses as much as digits as its factorization.

134993921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52488, while the sum is 41.

The square root of 134993921 is about 11618.6884371688. The cubic root of 134993921 is about 512.9850839291.

The spelling of 134993921 in words is "one hundred thirty-four million, nine hundred ninety-three thousand, nine hundred twenty-one".