51098849 has 2 divisors, whose sum is σ = 51098850. Its totient is φ = 51098848.

The previous prime is 51098807. The next prime is 51098851. The reversal of 51098849 is 94889015.

51098849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47018449 + 4080400 = 6857^2 + 2020^2 .

It is a cyclic number.

It is not a de Polignac number, because 51098849 - 2¹⁶ = 51033313 is a prime.

It is a super-2 number, since 2×51098849² = 5222184738249602, which contains 22 as substring.

Together with 51098851, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51098869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25549424 + 25549425.

It is an arithmetic number, because the mean of its divisors is an integer number (25549425).

Almost surely, 2^51098849 is an apocalyptic number.

It is an amenable number.

51098849 is a deficient number, since it is larger than the sum of its proper divisors (1).

51098849 is an equidigital number, since it uses as much as digits as its factorization.

51098849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 51098849 is about 7148.3458925824. The cubic root of 51098849 is about 371.0824135249.

The spelling of 51098849 in words is "fifty-one million, ninety-eight thousand, eight hundred forty-nine".