128893763 has 4 divisors (see below), whose sum is σ = 128964240. Its totient is φ = 128823288.

The previous prime is 128893759. The next prime is 128893769. The reversal of 128893763 is 367398821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 367398821 = 113 ⋅3251317.

It is a cyclic number.

It is not a de Polignac number, because 128893763 - 2² = 128893759 is a prime.

It is a super-2 number, since 2×128893763² = 33227204280600338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128893769) 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, 32420 + ... + 36177.

It is an arithmetic number, because the mean of its divisors is an integer number (32241060).

Almost surely, 2^128893763 is an apocalyptic number.

128893763 is a deficient number, since it is larger than the sum of its proper divisors (70477).

128893763 is an equidigital number, since it uses as much as digits as its factorization.

128893763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70476.

The product of its digits is 435456, while the sum is 47.

The square root of 128893763 is about 11353.1389051663. The cubic root of 128893763 is about 505.1386907899.

The spelling of 128893763 in words is "one hundred twenty-eight million, eight hundred ninety-three thousand, seven hundred sixty-three".