220001693 has 4 divisors (see below), whose sum is σ = 229567008. Its totient is φ = 210436380.

The previous prime is 220001623. The next prime is 220001701. The reversal of 220001693 is 396100022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220001693 - 2¹⁴ = 219985309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 9565291 = 220001693 / (2 + 2 + 0 + 0 + 0 + 1 + 6 + 9 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220001603) 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 3 ways as a sum of consecutive naturals, for example, 4782623 + ... + 4782668.

It is an arithmetic number, because the mean of its divisors is an integer number (57391752).

Almost surely, 2^220001693 is an apocalyptic number.

220001693 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

220001693 is a deficient number, since it is larger than the sum of its proper divisors (9565315).

220001693 is an equidigital number, since it uses as much as digits as its factorization.

220001693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9565314.

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

The square root of 220001693 is about 14832.4540450999. The cubic root of 220001693 is about 603.6826222092.

The spelling of 220001693 in words is "two hundred twenty million, one thousand, six hundred ninety-three".