990625017 has 8 divisors (see below), whose sum is σ = 1323156960. Its totient is φ = 659254880.

The previous prime is 990624991. The next prime is 990625033. The reversal of 990625017 is 710526099.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 990625017 - 2⁶ = 990624953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (990625417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288459 + ... + 291872.

It is an arithmetic number, because the mean of its divisors is an integer number (165394620).

Almost surely, 2^990625017 is an apocalyptic number.

It is an amenable number.

990625017 is a deficient number, since it is larger than the sum of its proper divisors (332531943).

990625017 is a wasteful number, since it uses less digits than its factorization.

990625017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580903.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 990625017 is about 31474.1960500979. The cubic root of 990625017 is about 996.8651888946.

The spelling of 990625017 in words is "nine hundred ninety million, six hundred twenty-five thousand, seventeen".