245687801 has 2 divisors, whose sum is σ = 245687802. Its totient is φ = 245687800.

The previous prime is 245687777. The next prime is 245687821. The reversal of 245687801 is 108786542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 243204025 + 2483776 = 15595^2 + 1576^2 .

It is a cyclic number.

It is not a de Polignac number, because 245687801 - 2⁶ = 245687737 is a prime.

It is not a weakly prime, because it can be changed into another prime (245687821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122843900 + 122843901.

It is an arithmetic number, because the mean of its divisors is an integer number (122843901).

Almost surely, 2^245687801 is an apocalyptic number.

It is an amenable number.

245687801 is a deficient number, since it is larger than the sum of its proper divisors (1).

245687801 is an equidigital number, since it uses as much as digits as its factorization.

245687801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 245687801 is about 15674.4314410444. The cubic root of 245687801 is about 626.3174777059.

The spelling of 245687801 in words is "two hundred forty-five million, six hundred eighty-seven thousand, eight hundred one".