999970505 has 12 divisors (see below), whose sum is σ = 1204994700. Its totient is φ = 796630464.

The previous prime is 999970501. The next prime is 999970591. The reversal of 999970505 is 505079999.

It can be written as a sum of positive squares in 6 ways, for example, as 28526281 + 971444224 = 5341^2 + 31168^2 .

It is not a de Polignac number, because 999970505 - 2² = 999970501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999970501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1320587 + ... + 1321343.

It is an arithmetic number, because the mean of its divisors is an integer number (100416225).

Almost surely, 2^999970505 is an apocalyptic number.

It is an amenable number.

999970505 is a deficient number, since it is larger than the sum of its proper divisors (205024195).

999970505 is an frugal number, since it uses more digits than its factorization.

999970505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1868 (or 1111 counting only the distinct ones).

The product of its (nonzero) digits is 1148175, while the sum is 53.

The square root of 999970505 is about 31622.3102413470. The cubic root of 999970505 is about 999.9901682367.

The spelling of 999970505 in words is "nine hundred ninety-nine million, nine hundred seventy thousand, five hundred five".