53138923 has 4 divisors (see below), whose sum is σ = 56264760. Its totient is φ = 50013088.

The previous prime is 53138909. The next prime is 53138951. The reversal of 53138923 is 32983135.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32983135 = 5 ⋅6596627.

It is a cyclic number.

It is not a de Polignac number, because 53138923 - 2¹³ = 53130731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53138903) 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, 1562893 + ... + 1562926.

It is an arithmetic number, because the mean of its divisors is an integer number (14066190).

Almost surely, 2^53138923 is an apocalyptic number.

53138923 is a deficient number, since it is larger than the sum of its proper divisors (3125837).

53138923 is a wasteful number, since it uses less digits than its factorization.

53138923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3125836.

The product of its digits is 19440, while the sum is 34.

The square root of 53138923 is about 7289.6449159064. The cubic root of 53138923 is about 375.9564868727.

The spelling of 53138923 in words is "fifty-three million, one hundred thirty-eight thousand, nine hundred twenty-three".