163423402 has 8 divisors (see below), whose sum is σ = 247889700. Its totient is φ = 80793504.

The previous prime is 163423399. The next prime is 163423409. The reversal of 163423402 is 204324361.

It can be written as a sum of positive squares in 2 ways, for example, as 159997201 + 3426201 = 12649^2 + 1851^2 .

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

It is not an unprimeable number, because it can be changed into a prime (163423409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458877 + ... + 459232.

Almost surely, 2^163423402 is an apocalyptic number.

163423402 is a deficient number, since it is larger than the sum of its proper divisors (84466298).

163423402 is an equidigital number, since it uses as much as digits as its factorization.

163423402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918200.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 163423402 is about 12783.7162828342. The cubic root of 163423402 is about 546.7281250720.

Adding to 163423402 its reverse (204324361), we get a palindrome (367747763).

The spelling of 163423402 in words is "one hundred sixty-three million, four hundred twenty-three thousand, four hundred two".