51474769 has 2 divisors, whose sum is σ = 51474770. Its totient is φ = 51474768.

The previous prime is 51474767. The next prime is 51474779. The reversal of 51474769 is 96747415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43718544 + 7756225 = 6612^2 + 2785^2 .

It is a cyclic number.

It is not a de Polignac number, because 51474769 - 2¹ = 51474767 is a prime.

It is a super-2 number, since 2×51474769² = 5299303687206722, which contains 22 as substring.

Together with 51474767, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51474763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25737384 + 25737385.

It is an arithmetic number, because the mean of its divisors is an integer number (25737385).

Almost surely, 2^51474769 is an apocalyptic number.

It is an amenable number.

51474769 is a deficient number, since it is larger than the sum of its proper divisors (1).

51474769 is an equidigital number, since it uses as much as digits as its factorization.

51474769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 43.

The square root of 51474769 is about 7174.5919047706. The cubic root of 51474769 is about 371.9901744235.

The spelling of 51474769 in words is "fifty-one million, four hundred seventy-four thousand, seven hundred sixty-nine".