72208169 has 8 divisors (see below), whose sum is σ = 79852512. Its totient is φ = 64743840.

The previous prime is 72208141. The next prime is 72208177. The reversal of 72208169 is 96180227.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 72208169 - 2⁸ = 72207913 is a prime.

It is a super-2 number, since 2×72208169² = 10428039340665122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72208369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44159 + ... + 45764.

It is an arithmetic number, because the mean of its divisors is an integer number (9981564).

Almost surely, 2^72208169 is an apocalyptic number.

It is an amenable number.

72208169 is a deficient number, since it is larger than the sum of its proper divisors (7644343).

72208169 is a wasteful number, since it uses less digits than its factorization.

72208169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90007.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 72208169 is about 8497.5389966743. The cubic root of 72208169 is about 416.4173130622.

The spelling of 72208169 in words is "seventy-two million, two hundred eight thousand, one hundred sixty-nine".