990379 has 16 divisors (see below), whose sum is σ = 1149120. Its totient is φ = 846720.

The previous prime is 990377. The next prime is 990383. The reversal of 990379 is 973099.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 990379 - 2¹ = 990377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13914 + ... + 13984.

It is an arithmetic number, because the mean of its divisors is an integer number (71820).

2⁹⁹⁰³⁷⁹ is an apocalyptic number.

990379 is a deficient number, since it is larger than the sum of its proper divisors (158741).

990379 is a wasteful number, since it uses less digits than its factorization.

990379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150.

The product of its (nonzero) digits is 15309, while the sum is 37.

The square root of 990379 is about 995.1778735482. The cubic root of 990379 is about 99.6782659823.

It can be divided in two parts, 990 and 379, that added together give a square (1369 = 37²).

The spelling of 990379 in words is "nine hundred ninety thousand, three hundred seventy-nine".