990533701 has 4 divisors (see below), whose sum is σ = 997764012. Its totient is φ = 983303392.

The previous prime is 990533689. The next prime is 990533717. The reversal of 990533701 is 107335099.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 107335099 = 2137 ⋅50227.

It can be written as a sum of positive squares in 2 ways, for example, as 829497601 + 161036100 = 28801^2 + 12690^2 .

It is a cyclic number.

It is not a de Polignac number, because 990533701 - 2¹⁹ = 990009413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991533701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3614950 + ... + 3615223.

It is an arithmetic number, because the mean of its divisors is an integer number (249441003).

Almost surely, 2^990533701 is an apocalyptic number.

It is an amenable number.

990533701 is a deficient number, since it is larger than the sum of its proper divisors (7230311).

990533701 is a wasteful number, since it uses less digits than its factorization.

990533701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7230310.

The product of its (nonzero) digits is 25515, while the sum is 37.

The square root of 990533701 is about 31472.7453680164. The cubic root of 990533701 is about 996.8345575467.

The spelling of 990533701 in words is "nine hundred ninety million, five hundred thirty-three thousand, seven hundred one".