72643469 has 8 divisors (see below), whose sum is σ = 76343520. Its totient is φ = 69034896.

The previous prime is 72643451. The next prime is 72643489. The reversal of 72643469 is 96434627.

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

It is not a de Polignac number, because 72643469 - 2¹² = 72639373 is a prime.

It is a super-2 number, since 2×72643469² = 10554147176707922, 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 (72643489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21239 + ... + 24420.

It is an arithmetic number, because the mean of its divisors is an integer number (9542940).

Almost surely, 2^72643469 is an apocalyptic number.

It is an amenable number.

72643469 is a deficient number, since it is larger than the sum of its proper divisors (3700051).

72643469 is a wasteful number, since it uses less digits than its factorization.

72643469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45739.

The product of its digits is 217728, while the sum is 41.

The square root of 72643469 is about 8523.1138089316. The cubic root of 72643469 is about 417.2524144309.

The spelling of 72643469 in words is "seventy-two million, six hundred forty-three thousand, four hundred sixty-nine".