135021373 has 2 divisors, whose sum is σ = 135021374. Its totient is φ = 135021372.

The previous prime is 135021269. The next prime is 135021379. The reversal of 135021373 is 373120531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129004164 + 6017209 = 11358^2 + 2453^2 .

It is a cyclic number.

It is not a de Polignac number, because 135021373 - 2²¹ = 132924221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135021379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67510686 + 67510687.

It is an arithmetic number, because the mean of its divisors is an integer number (67510687).

Almost surely, 2^135021373 is an apocalyptic number.

It is an amenable number.

135021373 is a deficient number, since it is larger than the sum of its proper divisors (1).

135021373 is an equidigital number, since it uses as much as digits as its factorization.

135021373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 25.

The square root of 135021373 is about 11619.8697497003. The cubic root of 135021373 is about 513.0198546603.

The spelling of 135021373 in words is "one hundred thirty-five million, twenty-one thousand, three hundred seventy-three".