135023453 has 4 divisors (see below), whose sum is σ = 135083520. Its totient is φ = 134963388.

The previous prime is 135023437. The next prime is 135023461. The reversal of 135023453 is 354320531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 354320531 = 19 ⋅18648449.

It is a cyclic number.

It is not a de Polignac number, because 135023453 - 2⁴ = 135023437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135023953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26525 + ... + 31202.

It is an arithmetic number, because the mean of its divisors is an integer number (33770880).

Almost surely, 2^135023453 is an apocalyptic number.

It is an amenable number.

135023453 is a deficient number, since it is larger than the sum of its proper divisors (60067).

135023453 is an equidigital number, since it uses as much as digits as its factorization.

135023453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60066.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 135023453 is about 11619.9592512194. The cubic root of 135023453 is about 513.0224889984.

Adding to 135023453 its reverse (354320531), we get a palindrome (489343984).

The spelling of 135023453 in words is "one hundred thirty-five million, twenty-three thousand, four hundred fifty-three".