51409469 has 2 divisors, whose sum is σ = 51409470. Its totient is φ = 51409468.

The previous prime is 51409451. The next prime is 51409481. The reversal of 51409469 is 96490415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29833444 + 21576025 = 5462^2 + 4645^2 .

It is a cyclic number.

It is not a de Polignac number, because 51409469 - 2⁸ = 51409213 is a prime.

It is a super-3 number, since 3×51409469³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51409409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25704734 + 25704735.

It is an arithmetic number, because the mean of its divisors is an integer number (25704735).

Almost surely, 2^51409469 is an apocalyptic number.

It is an amenable number.

51409469 is a deficient number, since it is larger than the sum of its proper divisors (1).

51409469 is an equidigital number, since it uses as much as digits as its factorization.

51409469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 51409469 is about 7170.0396791092. The cubic root of 51409469 is about 371.8328077640.

The spelling of 51409469 in words is "fifty-one million, four hundred nine thousand, four hundred sixty-nine".