1653138939 has 16 divisors (see below), whose sum is σ = 2414322720. Its totient is φ = 1001495040.

The previous prime is 1653138923. The next prime is 1653138959. The reversal of 1653138939 is 9398313561.

It is not a de Polignac number, because 1653138939 - 2⁴ = 1653138923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1653138959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 557392 + ... + 560349.

It is an arithmetic number, because the mean of its divisors is an integer number (150895170).

Almost surely, 2^1653138939 is an apocalyptic number.

1653138939 is a deficient number, since it is larger than the sum of its proper divisors (761183781).

1653138939 is a wasteful number, since it uses less digits than its factorization.

1653138939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117790.

The product of its digits is 524880, while the sum is 48.

The square root of 1653138939 is about 40658.8113328464. The cubic root of 1653138939 is about 1182.4146044261.

The spelling of 1653138939 in words is "one billion, six hundred fifty-three million, one hundred thirty-eight thousand, nine hundred thirty-nine".