135450639 has 12 divisors (see below), whose sum is σ = 205948600. Its totient is φ = 85547664.

The previous prime is 135450587. The next prime is 135450643. The reversal of 135450639 is 936054531.

135450639 is a `hidden beast` number, since 13 + 5 + 4 + 5 + 0 + 639 = 666.

It is not a de Polignac number, because 135450639 - 2⁹ = 135450127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135458639) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 395884 + ... + 396225.

Almost surely, 2^135450639 is an apocalyptic number.

135450639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

135450639 is a deficient number, since it is larger than the sum of its proper divisors (70497961).

135450639 is a wasteful number, since it uses less digits than its factorization.

135450639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792134 (or 792131 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The square root of 135450639 is about 11638.3262971958. The cubic root of 135450639 is about 513.5629514247.

The spelling of 135450639 in words is "one hundred thirty-five million, four hundred fifty thousand, six hundred thirty-nine".