845457407 has 2 divisors, whose sum is σ = 845457408. Its totient is φ = 845457406.

The previous prime is 845457343. The next prime is 845457409. The reversal of 845457407 is 704754548.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 845457407 - 2⁶ = 845457343 is a prime.

Together with 845457409, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (845457409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422728703 + 422728704.

It is an arithmetic number, because the mean of its divisors is an integer number (422728704).

Almost surely, 2^845457407 is an apocalyptic number.

845457407 is a deficient number, since it is larger than the sum of its proper divisors (1).

845457407 is an equidigital number, since it uses as much as digits as its factorization.

845457407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 627200, while the sum is 44.

The square root of 845457407 is about 29076.7502826571. The cubic root of 845457407 is about 945.5777499690.

The spelling of 845457407 in words is "eight hundred forty-five million, four hundred fifty-seven thousand, four hundred seven".