72841669 has 4 divisors (see below), whose sum is σ = 73867680. Its totient is φ = 71815660.

The previous prime is 72841619. The next prime is 72841697. The reversal of 72841669 is 96614827.

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 72841669 - 2⁷ = 72841541 is a prime.

It is a super-2 number, since 2×72841669² = 10611817485411122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72841619) 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, 512899 + ... + 513040.

It is an arithmetic number, because the mean of its divisors is an integer number (18466920).

Almost surely, 2^72841669 is an apocalyptic number.

It is an amenable number.

72841669 is a deficient number, since it is larger than the sum of its proper divisors (1026011).

72841669 is a wasteful number, since it uses less digits than its factorization.

72841669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026010.

The product of its digits is 145152, while the sum is 43.

The square root of 72841669 is about 8534.7330948308. The cubic root of 72841669 is about 417.6315461512.

The spelling of 72841669 in words is "seventy-two million, eight hundred forty-one thousand, six hundred sixty-nine".