428583961 has 4 divisors (see below), whose sum is σ = 461551972. Its totient is φ = 395615952.

The previous prime is 428583943. The next prime is 428583971. The reversal of 428583961 is 169385824.

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 105267600 + 323316361 = 10260^2 + 17981^2 .

It is a cyclic number.

It is not a de Polignac number, because 428583961 - 2¹³ = 428575769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428583971) 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, 16483986 + ... + 16484011.

It is an arithmetic number, because the mean of its divisors is an integer number (115387993).

Almost surely, 2^428583961 is an apocalyptic number.

It is an amenable number.

428583961 is a deficient number, since it is larger than the sum of its proper divisors (32968011).

428583961 is a wasteful number, since it uses less digits than its factorization.

428583961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32968010.

The product of its digits is 414720, while the sum is 46.

The square root of 428583961 is about 20702.2694649645. The cubic root of 428583961 is about 753.9547901183.

The spelling of 428583961 in words is "four hundred twenty-eight million, five hundred eighty-three thousand, nine hundred sixty-one".