72529161 has 4 divisors (see below), whose sum is σ = 96705552. Its totient is φ = 48352772.

The previous prime is 72529153. The next prime is 72529169. The reversal of 72529161 is 16192527.

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 an interprime number because it is at equal distance from previous prime (72529153) and next prime (72529169).

It is a cyclic number.

It is not a de Polignac number, because 72529161 - 2³ = 72529153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72529169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12088191 + ... + 12088196.

It is an arithmetic number, because the mean of its divisors is an integer number (24176388).

Almost surely, 2^72529161 is an apocalyptic number.

It is an amenable number.

72529161 is a deficient number, since it is larger than the sum of its proper divisors (24176391).

72529161 is a wasteful number, since it uses less digits than its factorization.

72529161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24176390.

The product of its digits is 7560, while the sum is 33.

The square root of 72529161 is about 8516.4054036900. The cubic root of 72529161 is about 417.0334439417.

The spelling of 72529161 in words is "seventy-two million, five hundred twenty-nine thousand, one hundred sixty-one".