869606401 has 2 divisors, whose sum is σ = 869606402. Its totient is φ = 869606400.

The previous prime is 869606399. The next prime is 869606411. The reversal of 869606401 is 104606968.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 851764225 + 17842176 = 29185^2 + 4224^2 .

It is a cyclic number.

It is not a de Polignac number, because 869606401 - 2¹ = 869606399 is a prime.

Together with 869606399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (869606411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434803200 + 434803201.

It is an arithmetic number, because the mean of its divisors is an integer number (434803201).

Almost surely, 2^869606401 is an apocalyptic number.

It is an amenable number.

869606401 is a deficient number, since it is larger than the sum of its proper divisors (1).

869606401 is an equidigital number, since it uses as much as digits as its factorization.

869606401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 869606401 is about 29489.0895247717. The cubic root of 869606401 is about 954.4962854440.

The spelling of 869606401 in words is "eight hundred sixty-nine million, six hundred six thousand, four hundred one".