52078309 has 2 divisors, whose sum is σ = 52078310. Its totient is φ = 52078308.

The previous prime is 52078307. The next prime is 52078321. The reversal of 52078309 is 90387025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36844900 + 15233409 = 6070^2 + 3903^2 .

It is a cyclic number.

It is not a de Polignac number, because 52078309 - 2¹ = 52078307 is a prime.

Together with 52078307, 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 (52078307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26039154 + 26039155.

It is an arithmetic number, because the mean of its divisors is an integer number (26039155).

Almost surely, 2^52078309 is an apocalyptic number.

It is an amenable number.

52078309 is a deficient number, since it is larger than the sum of its proper divisors (1).

52078309 is an equidigital number, since it uses as much as digits as its factorization.

52078309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 52078309 is about 7216.5302604507. The cubic root of 52078309 is about 373.4383865889.

The spelling of 52078309 in words is "fifty-two million, seventy-eight thousand, three hundred nine".