51947069 has 2 divisors, whose sum is σ = 51947070. Its totient is φ = 51947068.

The previous prime is 51947057. The next prime is 51947101. The reversal of 51947069 is 96074915.

51947069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35259844 + 16687225 = 5938^2 + 4085^2 .

It is a cyclic number.

It is not a de Polignac number, because 51947069 - 2⁸ = 51946813 is a prime.

It is a super-2 number, since 2×51947069² = 5396995955381522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51947009) 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, 25973534 + 25973535.

It is an arithmetic number, because the mean of its divisors is an integer number (25973535).

Almost surely, 2^51947069 is an apocalyptic number.

It is an amenable number.

51947069 is a deficient number, since it is larger than the sum of its proper divisors (1).

51947069 is an equidigital number, since it uses as much as digits as its factorization.

51947069 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 51947069 is about 7207.4315119882. The cubic root of 51947069 is about 373.1244281047.

The spelling of 51947069 in words is "fifty-one million, nine hundred forty-seven thousand, sixty-nine".