851242349 has 2 divisors, whose sum is σ = 851242350. Its totient is φ = 851242348.

The previous prime is 851242321. The next prime is 851242391. The reversal of 851242349 is 943242158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 476548900 + 374693449 = 21830^2 + 19357^2 .

It is a cyclic number.

It is not a de Polignac number, because 851242349 - 2¹⁶ = 851176813 is a prime.

It is a super-2 number, since 2×851242349² = 1449227073462075602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (851242549) 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, 425621174 + 425621175.

It is an arithmetic number, because the mean of its divisors is an integer number (425621175).

Almost surely, 2^851242349 is an apocalyptic number.

It is an amenable number.

851242349 is a deficient number, since it is larger than the sum of its proper divisors (1).

851242349 is an equidigital number, since it uses as much as digits as its factorization.

851242349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 38.

The square root of 851242349 is about 29176.0578043025. The cubic root of 851242349 is about 947.7295175240.

The spelling of 851242349 in words is "eight hundred fifty-one million, two hundred forty-two thousand, three hundred forty-nine".