9999772 has 6 divisors (see below), whose sum is σ = 17499608. Its totient is φ = 4999884.

The previous prime is 9999761. The next prime is 9999823. The reversal of 9999772 is 2779999.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1249968 + ... + 1249975.

Almost surely, 2^9999772 is an apocalyptic number.

It is an amenable number.

9999772 is a deficient number, since it is larger than the sum of its proper divisors (7499836).

9999772 is a wasteful number, since it uses less digits than its factorization.

9999772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2499947 (or 2499945 counting only the distinct ones).

The product of its digits is 642978, while the sum is 52.

The square root of 9999772 is about 3162.2416099976. The cubic root of 9999772 is about 215.4418316204.

The spelling of 9999772 in words is "nine million, nine hundred ninety-nine thousand, seven hundred seventy-two".