128370733 has 4 divisors (see below), whose sum is σ = 132797340. Its totient is φ = 123944128.

The previous prime is 128370731. The next prime is 128370743. The reversal of 128370733 is 337073821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 96864964 + 31505769 = 9842^2 + 5613^2 .

It is a cyclic number.

It is not a de Polignac number, because 128370733 - 2¹ = 128370731 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 (128370731) 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, 2213260 + ... + 2213317.

It is an arithmetic number, because the mean of its divisors is an integer number (33199335).

Almost surely, 2^128370733 is an apocalyptic number.

It is an amenable number.

128370733 is a deficient number, since it is larger than the sum of its proper divisors (4426607).

128370733 is an equidigital number, since it uses as much as digits as its factorization.

128370733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4426606.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 128370733 is about 11330.0808911499. The cubic root of 128370733 is about 504.4545075396.

The spelling of 128370733 in words is "one hundred twenty-eight million, three hundred seventy thousand, seven hundred thirty-three".