423620161 has 8 divisors (see below), whose sum is σ = 448726824. Its totient is φ = 398534400.

The previous prime is 423620137. The next prime is 423620167. The reversal of 423620161 is 161026324.

It can be written as a sum of positive squares in 4 ways, for example, as 238115761 + 185504400 = 15431^2 + 13620^2 .

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

It is not a de Polignac number, because 423620161 - 2⁷ = 423620033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423620167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59551 + ... + 66283.

It is an arithmetic number, because the mean of its divisors is an integer number (56090853).

Almost surely, 2^423620161 is an apocalyptic number.

It is an amenable number.

423620161 is a deficient number, since it is larger than the sum of its proper divisors (25106663).

423620161 is a wasteful number, since it uses less digits than its factorization.

423620161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10451.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 423620161 is about 20582.0349091143. The cubic root of 423620161 is about 751.0327467410.

Adding to 423620161 its reverse (161026324), we get a palindrome (584646485).

The spelling of 423620161 in words is "four hundred twenty-three million, six hundred twenty thousand, one hundred sixty-one".