128932373 has 4 divisors (see below), whose sum is σ = 128962380. Its totient is φ = 128902368.

The previous prime is 128932367. The next prime is 128932393. The reversal of 128932373 is 373239821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 373239821 = 7699 ⋅48479.

It can be written as a sum of positive squares in 2 ways, for example, as 88698724 + 40233649 = 9418^2 + 6343^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128932373 is a prime.

It is a super-2 number, since 2×128932373² = 33247113614822258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128932343) 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, 7208 + ... + 17601.

It is an arithmetic number, because the mean of its divisors is an integer number (32240595).

Almost surely, 2^128932373 is an apocalyptic number.

It is an amenable number.

128932373 is a deficient number, since it is larger than the sum of its proper divisors (30007).

128932373 is an equidigital number, since it uses as much as digits as its factorization.

128932373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30006.

The product of its digits is 54432, while the sum is 38.

The square root of 128932373 is about 11354.8391886455. The cubic root of 128932373 is about 505.1891236873.

The spelling of 128932373 in words is "one hundred twenty-eight million, nine hundred thirty-two thousand, three hundred seventy-three".