990351 has 6 divisors (see below), whose sum is σ = 1430520. Its totient is φ = 660228.

The previous prime is 990349. The next prime is 990359. The reversal of 990351 is 153099.

It is not a de Polignac number, because 990351 - 2¹ = 990349 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990359) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55011 + ... + 55028.

It is an arithmetic number, because the mean of its divisors is an integer number (238420).

2⁹⁹⁰³⁵¹ is an apocalyptic number.

990351 is a deficient number, since it is larger than the sum of its proper divisors (440169).

990351 is a wasteful number, since it uses less digits than its factorization.

990351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110045 (or 110042 counting only the distinct ones).

The product of its (nonzero) digits is 1215, while the sum is 27.

The square root of 990351 is about 995.1638056119. The cubic root of 990351 is about 99.6773266053.

The spelling of 990351 in words is "nine hundred ninety thousand, three hundred fifty-one".