128302783 has 4 divisors (see below), whose sum is σ = 146631760. Its totient is φ = 109973808.

The previous prime is 128302781. The next prime is 128302787. The reversal of 128302783 is 387203821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 387203821 = 139 ⋅2785639.

It is not a de Polignac number, because 128302783 - 2¹ = 128302781 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 (128302781) 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, 9164478 + ... + 9164491.

It is an arithmetic number, because the mean of its divisors is an integer number (36657940).

Almost surely, 2^128302783 is an apocalyptic number.

128302783 is a deficient number, since it is larger than the sum of its proper divisors (18328977).

128302783 is an equidigital number, since it uses as much as digits as its factorization.

128302783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18328976.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 128302783 is about 11327.0818395560. The cubic root of 128302783 is about 504.3654848244.

The spelling of 128302783 in words is "one hundred twenty-eight million, three hundred two thousand, seven hundred eighty-three".