969849581 has 6 divisors (see below), whose sum is σ = 1003466190. Its totient is φ = 936244568.

The previous prime is 969849577. The next prime is 969849599. The reversal of 969849581 is 185948969.

It can be written as a sum of positive squares in only one way, i.e., 836077225 + 133772356 = 28915^2 + 11566^2 .

It is not a de Polignac number, because 969849581 - 2² = 969849577 is a prime.

It is a super-2 number, since 2×969849581² = 1881216419531751122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 969849581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (969849521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 164816 + ... + 170598.

It is an arithmetic number, because the mean of its divisors is an integer number (167244365).

Almost surely, 2^969849581 is an apocalyptic number.

It is an amenable number.

969849581 is a deficient number, since it is larger than the sum of its proper divisors (33616609).

969849581 is an frugal number, since it uses more digits than its factorization.

969849581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11595 (or 5812 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 59.

The square root of 969849581 is about 31142.4080796588. The cubic root of 969849581 is about 989.8471283867.

The spelling of 969849581 in words is "nine hundred sixty-nine million, eight hundred forty-nine thousand, five hundred eighty-one".