869887972 has 6 divisors (see below), whose sum is σ = 1522303958. Its totient is φ = 434943984.

The previous prime is 869887969. The next prime is 869887981. The reversal of 869887972 is 279788968.

It can be written as a sum of positive squares in only one way, i.e., 867655936 + 2232036 = 29456^2 + 1494^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108735993 + ... + 108736000.

Almost surely, 2^869887972 is an apocalyptic number.

It is an amenable number.

869887972 is a deficient number, since it is larger than the sum of its proper divisors (652415986).

869887972 is a wasteful number, since it uses less digits than its factorization.

869887972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217471997 (or 217471995 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 64.

The square root of 869887972 is about 29493.8632939125. The cubic root of 869887972 is about 954.5992935295.

The spelling of 869887972 in words is "eight hundred sixty-nine million, eight hundred eighty-seven thousand, nine hundred seventy-two".