51992869 has 2 divisors, whose sum is σ = 51992870. Its totient is φ = 51992868.

The previous prime is 51992867. The next prime is 51992933. The reversal of 51992869 is 96829915.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33200644 + 18792225 = 5762^2 + 4335^2 .

It is a cyclic number.

It is not a de Polignac number, because 51992869 - 2¹ = 51992867 is a prime.

It is a super-2 number, since 2×51992869² = 5406516853702322, which contains 22 as substring.

Together with 51992867, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51992867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25996434 + 25996435.

It is an arithmetic number, because the mean of its divisors is an integer number (25996435).

Almost surely, 2^51992869 is an apocalyptic number.

It is an amenable number.

51992869 is a deficient number, since it is larger than the sum of its proper divisors (1).

51992869 is an equidigital number, since it uses as much as digits as its factorization.

51992869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 49.

The square root of 51992869 is about 7210.6080880880. The cubic root of 51992869 is about 373.2340530190.

The spelling of 51992869 in words is "fifty-one million, nine hundred ninety-two thousand, eight hundred sixty-nine".