990309095 has 4 divisors (see below), whose sum is σ = 1188370920. Its totient is φ = 792247272.

The previous prime is 990309077. The next prime is 990309097. The reversal of 990309095 is 590903099.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 590903099 = 73 ⋅8094563.

It is a cyclic number.

It is not a de Polignac number, because 990309095 - 2⁶ = 990309031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990309097) 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, 99030905 + ... + 99030914.

It is an arithmetic number, because the mean of its divisors is an integer number (297092730).

Almost surely, 2^990309095 is an apocalyptic number.

990309095 is a deficient number, since it is larger than the sum of its proper divisors (198061825).

990309095 is a wasteful number, since it uses less digits than its factorization.

990309095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198061824.

The product of its (nonzero) digits is 98415, while the sum is 44.

The square root of 990309095 is about 31469.1769037577. The cubic root of 990309095 is about 996.7592069394.

The spelling of 990309095 in words is "nine hundred ninety million, three hundred nine thousand, ninety-five".