851754949 has 2 divisors, whose sum is σ = 851754950. Its totient is φ = 851754948.

The previous prime is 851754941. The next prime is 851755043. The reversal of 851754949 is 949457158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 624650049 + 227104900 = 24993^2 + 15070^2 .

It is a cyclic number.

It is not a de Polignac number, because 851754949 - 2³ = 851754941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 851754896 and 851754905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (851754941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425877474 + 425877475.

It is an arithmetic number, because the mean of its divisors is an integer number (425877475).

Almost surely, 2^851754949 is an apocalyptic number.

It is an amenable number.

851754949 is a deficient number, since it is larger than the sum of its proper divisors (1).

851754949 is an equidigital number, since it uses as much as digits as its factorization.

851754949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1814400, while the sum is 52.

The square root of 851754949 is about 29184.8410823153. The cubic root of 851754949 is about 947.9197135239.

The spelling of 851754949 in words is "eight hundred fifty-one million, seven hundred fifty-four thousand, nine hundred forty-nine".