999976000145 has 4 divisors (see below), whose sum is σ = 1199971200180. Its totient is φ = 799980800112.

The previous prime is 999976000141. The next prime is 999976000157. The reversal of 999976000145 is 541000679999.

It is a Cunningham number, because it is equal to 999988²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541000679999 = 13 ⋅41615436923.

It can be written as a sum of positive squares in 2 ways, for example, as 359990400064 + 639985600081 = 599992^2 + 799991^2 .

It is a cyclic number.

It is not a de Polignac number, because 999976000145 - 2² = 999976000141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (999976000141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99997600010 + ... + 99997600019.

It is an arithmetic number, because the mean of its divisors is an integer number (299992800045).

Almost surely, 2^999976000145 is an apocalyptic number.

It is an amenable number.

999976000145 is a deficient number, since it is larger than the sum of its proper divisors (199995200035).

999976000145 is a wasteful number, since it uses less digits than its factorization.

999976000145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199995200034.

The product of its (nonzero) digits is 5511240, while the sum is 59.

The spelling of 999976000145 in words is "nine hundred ninety-nine billion, nine hundred seventy-six million, one hundred forty-five", and thus it is an aban number.