426128977 has 4 divisors (see below), whose sum is σ = 426186036. Its totient is φ = 426071920.

The previous prime is 426128971. The next prime is 426128993. The reversal of 426128977 is 779821624.

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 250937281 + 175191696 = 15841^2 + 13236^2 .

It is a cyclic number.

It is not a de Polignac number, because 426128977 - 2¹¹ = 426126929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (426128971) 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, 15274 + ... + 32947.

It is an arithmetic number, because the mean of its divisors is an integer number (106546509).

Almost surely, 2^426128977 is an apocalyptic number.

It is an amenable number.

426128977 is a deficient number, since it is larger than the sum of its proper divisors (57059).

426128977 is an equidigital number, since it uses as much as digits as its factorization.

426128977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57058.

The product of its digits is 338688, while the sum is 46.

The square root of 426128977 is about 20642.8916821263. The cubic root of 426128977 is about 752.5124493255.

The spelling of 426128977 in words is "four hundred twenty-six million, one hundred twenty-eight thousand, nine hundred seventy-seven".