451982857 has 2 divisors, whose sum is σ = 451982858. Its totient is φ = 451982856.

The previous prime is 451982837. The next prime is 451982897. The reversal of 451982857 is 758289154.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 399840016 + 52142841 = 19996^2 + 7221^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-451982857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 451982857.

It is not a weakly prime, because it can be changed into another prime (451982807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225991428 + 225991429.

It is an arithmetic number, because the mean of its divisors is an integer number (225991429).

Almost surely, 2^451982857 is an apocalyptic number.

It is an amenable number.

451982857 is a deficient number, since it is larger than the sum of its proper divisors (1).

451982857 is an equidigital number, since it uses as much as digits as its factorization.

451982857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 806400, while the sum is 49.

The square root of 451982857 is about 21259.8884522003. Note that the first 3 decimals coincide. The cubic root of 451982857 is about 767.4333254900.

The spelling of 451982857 in words is "four hundred fifty-one million, nine hundred eighty-two thousand, eight hundred fifty-seven".