999995690 has 32 divisors (see below), whose sum is σ = 1864200960. Its totient is φ = 385761600.

The previous prime is 999995681. The next prime is 999995701. The reversal of 999995690 is 96599999.

It is a super-2 number, since 2×999995690² = 1999982760037152200, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 373055 + ... + 375725.

It is an arithmetic number, because the mean of its divisors is an integer number (58256280).

Almost surely, 2^999995690 is an apocalyptic number.

999995690 is the 25820-th pentagonal number.

999995690 is a deficient number, since it is larger than the sum of its proper divisors (864205270).

999995690 is a wasteful number, since it uses less digits than its factorization.

999995690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3998.

The product of its (nonzero) digits is 15943230, while the sum is 65.

The square root of 999995690 is about 31622.7084545268. The cubic root of 999995690 is about 999.9985633313.

The spelling of 999995690 in words is "nine hundred ninety-nine million, nine hundred ninety-five thousand, six hundred ninety".