128494079 has 4 divisors (see below), whose sum is σ = 146850384. Its totient is φ = 110137776.

The previous prime is 128494073. The next prime is 128494103. The reversal of 128494079 is 970494821.

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

It is not a de Polignac number, because 128494079 - 2⁸ = 128493823 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 (128494073) 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, 9178142 + ... + 9178155.

It is an arithmetic number, because the mean of its divisors is an integer number (36712596).

Almost surely, 2^128494079 is an apocalyptic number.

128494079 is a deficient number, since it is larger than the sum of its proper divisors (18356305).

128494079 is an equidigital number, since it uses as much as digits as its factorization.

128494079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18356304.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 128494079 is about 11335.5228816319. The cubic root of 128494079 is about 504.6160254752.

The spelling of 128494079 in words is "one hundred twenty-eight million, four hundred ninety-four thousand, seventy-nine".