865902901 has 2 divisors, whose sum is σ = 865902902. Its totient is φ = 865902900.

The previous prime is 865902899. The next prime is 865902913. The reversal of 865902901 is 109209568.

865902901 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., 588014001 + 277888900 = 24249^2 + 16670^2 .

It is a cyclic number.

It is not a de Polignac number, because 865902901 - 2¹ = 865902899 is a prime.

Together with 865902899, 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 (865903901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432951450 + 432951451.

It is an arithmetic number, because the mean of its divisors is an integer number (432951451).

Almost surely, 2^865902901 is an apocalyptic number.

It is an amenable number.

865902901 is a deficient number, since it is larger than the sum of its proper divisors (1).

865902901 is an equidigital number, since it uses as much as digits as its factorization.

865902901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 865902901 is about 29426.2281137084. The cubic root of 865902901 is about 953.1393469574.

The spelling of 865902901 in words is "eight hundred sixty-five million, nine hundred two thousand, nine hundred one".