454985857 has 4 divisors (see below), whose sum is σ = 456938820. Its totient is φ = 453032896.

The previous prime is 454985833. The next prime is 454985863. The reversal of 454985857 is 758589454.

It is a happy number.

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 248661361 + 206324496 = 15769^2 + 14364^2 .

It is a cyclic number.

It is not a de Polignac number, because 454985857 - 2¹⁹ = 454461569 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 454985798 and 454985807.

It is not an unprimeable number, because it can be changed into a prime (454985887) 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, 976132 + ... + 976597.

It is an arithmetic number, because the mean of its divisors is an integer number (114234705).

Almost surely, 2^454985857 is an apocalyptic number.

It is an amenable number.

454985857 is a deficient number, since it is larger than the sum of its proper divisors (1952963).

454985857 is a wasteful number, since it uses less digits than its factorization.

454985857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952962.

The product of its digits is 8064000, while the sum is 55.

The square root of 454985857 is about 21330.3974880920. The cubic root of 454985857 is about 769.1291988529.

The spelling of 454985857 in words is "four hundred fifty-four million, nine hundred eighty-five thousand, eight hundred fifty-seven".