851408323 has 2 divisors, whose sum is σ = 851408324. Its totient is φ = 851408322.

The previous prime is 851408281. The next prime is 851408351. The reversal of 851408323 is 323804158.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 851408323 - 2⁹ = 851407811 is a prime.

It is a super-2 number, since 2×851408323² = 1449792264947344658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (851408353) 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, 425704161 + 425704162.

It is an arithmetic number, because the mean of its divisors is an integer number (425704162).

Almost surely, 2^851408323 is an apocalyptic number.

851408323 is a deficient number, since it is larger than the sum of its proper divisors (1).

851408323 is an equidigital number, since it uses as much as digits as its factorization.

851408323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 851408323 is about 29178.9020184105. The cubic root of 851408323 is about 947.7911091639.

The spelling of 851408323 in words is "eight hundred fifty-one million, four hundred eight thousand, three hundred twenty-three".