990371 has 2 divisors, whose sum is σ = 990372. Its totient is φ = 990370.

The previous prime is 990361. The next prime is 990377. The reversal of 990371 is 173099.

It is a strong prime.

It is an emirp because it is prime and its reverse (173099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 990371 - 2⁶ = 990307 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (990377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495185 + 495186.

It is an arithmetic number, because the mean of its divisors is an integer number (495186).

2⁹⁹⁰³⁷¹ is an apocalyptic number.

990371 is a deficient number, since it is larger than the sum of its proper divisors (1).

990371 is an equidigital number, since it uses as much as digits as its factorization.

990371 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1701, while the sum is 29.

The square root of 990371 is about 995.1738541582. The cubic root of 990371 is about 99.6779975907.

The spelling of 990371 in words is "nine hundred ninety thousand, three hundred seventy-one".