53128099 has 4 divisors (see below), whose sum is σ = 53222040. Its totient is φ = 53034160.

The previous prime is 53128073. The next prime is 53128109. The reversal of 53128099 is 99082135.

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 53128099 - 2⁵ = 53128067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53128039) 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, 46117 + ... + 47254.

It is an arithmetic number, because the mean of its divisors is an integer number (13305510).

Almost surely, 2^53128099 is an apocalyptic number.

53128099 is a deficient number, since it is larger than the sum of its proper divisors (93941).

53128099 is an equidigital number, since it uses as much as digits as its factorization.

53128099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93940.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 53128099 is about 7288.9024551026. The cubic root of 53128099 is about 375.9309586339.

The spelling of 53128099 in words is "fifty-three million, one hundred twenty-eight thousand, ninety-nine".