99969956 has 6 divisors (see below), whose sum is σ = 174947430. Its totient is φ = 49984976.

The previous prime is 99969949. The next prime is 99970007. The reversal of 99969956 is 65996999.

It can be written as a sum of positive squares in only one way, i.e., 65934400 + 34035556 = 8120^2 + 5834^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12496241 + ... + 12496248.

It is an arithmetic number, because the mean of its divisors is an integer number (29157905).

Almost surely, 2^99969956 is an apocalyptic number.

It is an amenable number.

99969956 is a deficient number, since it is larger than the sum of its proper divisors (74977474).

99969956 is a wasteful number, since it uses less digits than its factorization.

99969956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24992493 (or 24992491 counting only the distinct ones).

The product of its digits is 10628820, while the sum is 62.

The square root of 99969956 is about 9998.4976871528. The cubic root of 99969956 is about 464.1123947403.

The spelling of 99969956 in words is "ninety-nine million, nine hundred sixty-nine thousand, nine hundred fifty-six".