854319409 has 2 divisors, whose sum is σ = 854319410. Its totient is φ = 854319408.

The previous prime is 854319407. The next prime is 854319451. The reversal of 854319409 is 904913458.

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., 756250000 + 98069409 = 27500^2 + 9903^2 .

It is a cyclic number.

It is not a de Polignac number, because 854319409 - 2¹ = 854319407 is a prime.

Together with 854319407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (854319407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427159704 + 427159705.

It is an arithmetic number, because the mean of its divisors is an integer number (427159705).

Almost surely, 2^854319409 is an apocalyptic number.

It is an amenable number.

854319409 is a deficient number, since it is larger than the sum of its proper divisors (1).

854319409 is an equidigital number, since it uses as much as digits as its factorization.

854319409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 854319409 is about 29228.7428569892. The cubic root of 854319409 is about 948.8700911781.

The spelling of 854319409 in words is "eight hundred fifty-four million, three hundred nineteen thousand, four hundred nine".