51098869 has 2 divisors, whose sum is σ = 51098870. Its totient is φ = 51098868.

The previous prime is 51098863. The next prime is 51098891. The reversal of 51098869 is 96889015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50594769 + 504100 = 7113^2 + 710^2 .

It is a cyclic number.

It is not a de Polignac number, because 51098869 - 2⁷ = 51098741 is a prime.

It is a super-2 number, since 2×51098869² = 5222188826158322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51098863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25549434 + 25549435.

It is an arithmetic number, because the mean of its divisors is an integer number (25549435).

Almost surely, 2^51098869 is an apocalyptic number.

It is an amenable number.

51098869 is a deficient number, since it is larger than the sum of its proper divisors (1).

51098869 is an equidigital number, since it uses as much as digits as its factorization.

51098869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 46.

The square root of 51098869 is about 7148.3472915073. The cubic root of 51098869 is about 371.0824619386.

The spelling of 51098869 in words is "fifty-one million, ninety-eight thousand, eight hundred sixty-nine".