999999752 has 8 divisors (see below), whose sum is σ = 1874999550. Its totient is φ = 499999872.

The previous prime is 999999751. The next prime is 999999757. The reversal of 999999752 is 257999999.

It can be written as a sum of positive squares in only one way, i.e., 507781156 + 492218596 = 22534^2 + 22186^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (999999751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62499977 + ... + 62499992.

Almost surely, 2^999999752 is an apocalyptic number.

It is an amenable number.

999999752 is a deficient number, since it is larger than the sum of its proper divisors (874999798).

999999752 is a wasteful number, since it uses less digits than its factorization.

999999752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124999975 (or 124999971 counting only the distinct ones).

The product of its digits is 37200870, while the sum is 68.

The square root of 999999752 is about 31622.7726804593. The cubic root of 999999752 is about 999.9999173333. Note that the first 4 decimals are identical.

The spelling of 999999752 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, seven hundred fifty-two".