999710505 has 32 divisors (see below), whose sum is σ = 1799224320. Its totient is φ = 533173104.

The previous prime is 999710443. The next prime is 999710507. The reversal of 999710505 is 505017999.

It is not a de Polignac number, because 999710505 - 2⁷ = 999710377 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (999710507) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34777 + ... + 56646.

It is an arithmetic number, because the mean of its divisors is an integer number (56225760).

Almost surely, 2^999710505 is an apocalyptic number.

It is an amenable number.

999710505 is a deficient number, since it is larger than the sum of its proper divisors (799513815).

999710505 is an frugal number, since it uses more digits than its factorization.

999710505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91449 (or 91431 counting only the distinct ones).

The product of its (nonzero) digits is 127575, while the sum is 45.

The square root of 999710505 is about 31618.1989525020. The cubic root of 999710505 is about 999.9034923532.

It can be divided in two parts, 9997 and 10505, that added together give a palindrome (20502).

The spelling of 999710505 in words is "nine hundred ninety-nine million, seven hundred ten thousand, five hundred five".