73821669 has 16 divisors (see below), whose sum is σ = 106022400. Its totient is φ = 45538416.

The previous prime is 73821659. The next prime is 73821679. The reversal of 73821669 is 96612837.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (73821659) and next prime (73821679).

It is not a de Polignac number, because 73821669 - 2²¹ = 71724517 is a prime.

It is a super-2 number, since 2×73821669² = 10899277627891122, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 73821669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73821619) 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, 12609 + ... + 17510.

It is an arithmetic number, because the mean of its divisors is an integer number (6626400).

Almost surely, 2^73821669 is an apocalyptic number.

It is an amenable number.

73821669 is a deficient number, since it is larger than the sum of its proper divisors (32200731).

73821669 is a wasteful number, since it uses less digits than its factorization.

73821669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30184.

The product of its digits is 108864, while the sum is 42.

The square root of 73821669 is about 8591.9537359090. The cubic root of 73821669 is about 419.4961247661.

The spelling of 73821669 in words is "seventy-three million, eight hundred twenty-one thousand, six hundred sixty-nine".