51490697 has 2 divisors, whose sum is σ = 51490698. Its totient is φ = 51490696.

The previous prime is 51490667. The next prime is 51490723. The reversal of 51490697 is 79609415.

51490697 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., 28344976 + 23145721 = 5324^2 + 4811^2 .

It is a cyclic number.

It is not a de Polignac number, because 51490697 - 2⁶ = 51490633 is a prime.

It is not a weakly prime, because it can be changed into another prime (51490667) 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, 25745348 + 25745349.

It is an arithmetic number, because the mean of its divisors is an integer number (25745349).

Almost surely, 2^51490697 is an apocalyptic number.

It is an amenable number.

51490697 is a deficient number, since it is larger than the sum of its proper divisors (1).

51490697 is an equidigital number, since it uses as much as digits as its factorization.

51490697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 51490697 is about 7175.7018472063. The cubic root of 51490697 is about 372.0285391640.

The spelling of 51490697 in words is "fifty-one million, four hundred ninety thousand, six hundred ninety-seven".