52640297 has 2 divisors, whose sum is σ = 52640298. Its totient is φ = 52640296.

The previous prime is 52640293. The next prime is 52640303. The reversal of 52640297 is 79204625.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44368921 + 8271376 = 6661^2 + 2876^2 .

It is a cyclic number.

It is not a de Polignac number, because 52640297 - 2² = 52640293 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (52640293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26320148 + 26320149.

It is an arithmetic number, because the mean of its divisors is an integer number (26320149).

Almost surely, 2^52640297 is an apocalyptic number.

It is an amenable number.

52640297 is a deficient number, since it is larger than the sum of its proper divisors (1).

52640297 is an equidigital number, since it uses as much as digits as its factorization.

52640297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 52640297 is about 7255.3633265330. The cubic root of 52640297 is about 374.7768675544.

The spelling of 52640297 in words is "fifty-two million, six hundred forty thousand, two hundred ninety-seven".