4649139923 has 4 divisors (see below), whose sum is σ = 4922618760. Its totient is φ = 4375661088.

The previous prime is 4649139899. The next prime is 4649139931. The reversal of 4649139923 is 3299319464.

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

It is a cyclic number.

It is not a de Polignac number, because 4649139923 - 2²² = 4644945619 is a prime.

It is a super-4 number, since 4×4649139923⁴ (a number of 40 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4649139973) 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 3 ways as a sum of consecutive naturals, for example, 136739393 + ... + 136739426.

It is an arithmetic number, because the mean of its divisors is an integer number (1230654690).

Almost surely, 2^4649139923 is an apocalyptic number.

4649139923 is a deficient number, since it is larger than the sum of its proper divisors (273478837).

4649139923 is a wasteful number, since it uses less digits than its factorization.

4649139923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273478836.

The product of its digits is 1259712, while the sum is 50.

The square root of 4649139923 is about 68184.6018027531. The cubic root of 4649139923 is about 1669.0046207201.

The spelling of 4649139923 in words is "four billion, six hundred forty-nine million, one hundred thirty-nine thousand, nine hundred twenty-three".