163490 has 8 divisors (see below), whose sum is σ = 294300. Its totient is φ = 65392.

The previous prime is 163487. The next prime is 163517. The reversal of 163490 is 94361.

It can be written as a sum of positive squares in 2 ways, for example, as 152881 + 10609 = 391^2 + 103^2 .

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

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8165 + ... + 8184.

2¹⁶³⁴⁹⁰ is an apocalyptic number.

163490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163490 is a deficient number, since it is larger than the sum of its proper divisors (130810).

163490 is a wasteful number, since it uses less digits than its factorization.

163490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16356.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 163490 is about 404.3389667099. The cubic root of 163490 is about 54.6802382194.

The spelling of 163490 in words is "one hundred sixty-three thousand, four hundred ninety".