128532853 has 4 divisors (see below), whose sum is σ = 135297760. Its totient is φ = 121767948.

The previous prime is 128532841. The next prime is 128532863. The reversal of 128532853 is 358235821.

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, and also an emirpimes, since its reverse is a distinct semiprime: 358235821 = 691 ⋅518431.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128532853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128532863) 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, 3382425 + ... + 3382462.

It is an arithmetic number, because the mean of its divisors is an integer number (33824440).

Almost surely, 2^128532853 is an apocalyptic number.

It is an amenable number.

128532853 is a deficient number, since it is larger than the sum of its proper divisors (6764907).

128532853 is an equidigital number, since it uses as much as digits as its factorization.

128532853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6764906.

The product of its digits is 57600, while the sum is 37.

The square root of 128532853 is about 11337.2330398559. The cubic root of 128532853 is about 504.6667775259. Note that the first 3 decimals are identical.

The spelling of 128532853 in words is "one hundred twenty-eight million, five hundred thirty-two thousand, eight hundred fifty-three".