53109913 has 4 divisors (see below), whose sum is σ = 54823168. Its totient is φ = 51396660.

The previous prime is 53109899. The next prime is 53109937. The reversal of 53109913 is 31990135.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53109913 - 2⁹ = 53109401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 1713223 = 53109913 / (5 + 3 + 1 + 0 + 9 + 9 + 1 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53109983) 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, 856581 + ... + 856642.

It is an arithmetic number, because the mean of its divisors is an integer number (13705792).

Almost surely, 2^53109913 is an apocalyptic number.

It is an amenable number.

53109913 is a deficient number, since it is larger than the sum of its proper divisors (1713255).

53109913 is a wasteful number, since it uses less digits than its factorization.

53109913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713254.

The product of its (nonzero) digits is 3645, while the sum is 31.

The square root of 53109913 is about 7287.6548354049. The cubic root of 53109913 is about 375.8880594226. Note that the first 3 decimals are identical.

The spelling of 53109913 in words is "fifty-three million, one hundred nine thousand, nine hundred thirteen".