653129138 has 4 divisors (see below), whose sum is σ = 979693710. Its totient is φ = 326564568.

The previous prime is 653129131. The next prime is 653129153. The reversal of 653129138 is 831921356.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 444239929 + 208889209 = 21077^2 + 14453^2 .

It is not an unprimeable number, because it can be changed into a prime (653129131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163282283 + ... + 163282286.

Almost surely, 2^653129138 is an apocalyptic number.

653129138 is a deficient number, since it is larger than the sum of its proper divisors (326564572).

653129138 is a wasteful number, since it uses less digits than its factorization.

653129138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326564571.

The product of its digits is 38880, while the sum is 38.

The square root of 653129138 is about 25556.3913336762. The cubic root of 653129138 is about 867.6269226047.

The spelling of 653129138 in words is "six hundred fifty-three million, one hundred twenty-nine thousand, one hundred thirty-eight".