128417279 has 2 divisors, whose sum is σ = 128417280. Its totient is φ = 128417278.

The previous prime is 128417273. The next prime is 128417291. The reversal of 128417279 is 972714821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128417279 - 2¹² = 128413183 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128417273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64208639 + 64208640.

It is an arithmetic number, because the mean of its divisors is an integer number (64208640).

Almost surely, 2^128417279 is an apocalyptic number.

128417279 is a deficient number, since it is larger than the sum of its proper divisors (1).

128417279 is an equidigital number, since it uses as much as digits as its factorization.

128417279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 41.

The square root of 128417279 is about 11332.1347944683. The cubic root of 128417279 is about 504.5154702986.

The spelling of 128417279 in words is "one hundred twenty-eight million, four hundred seventeen thousand, two hundred seventy-nine".