869402061 has 36 divisors (see below), whose sum is σ = 1417717756. Its totient is φ = 512645760.

The previous prime is 869402021. The next prime is 869402077. The reversal of 869402061 is 160204968.

869402061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 759278025 + 110124036 = 27555^2 + 10494^2 .

It is not a de Polignac number, because 869402061 - 2⁶ = 869401997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869402021) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 29505 + ... + 51081.

Almost surely, 2^869402061 is an apocalyptic number.

It is an amenable number.

869402061 is a deficient number, since it is larger than the sum of its proper divisors (548315695).

869402061 is a wasteful number, since it uses less digits than its factorization.

869402061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21642 (or 21628 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 869402061 is about 29485.6246499883. The cubic root of 869402061 is about 954.4215171159.

The spelling of 869402061 in words is "eight hundred sixty-nine million, four hundred two thousand, sixty-one".