72881547 has 4 divisors (see below), whose sum is σ = 97175400. Its totient is φ = 48587696.

The previous prime is 72881539. The next prime is 72881551. The reversal of 72881547 is 74518827.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72881547 - 2³ = 72881539 is a prime.

It is a super-2 number, since 2×72881547² = 10623439786226418, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72881499 and 72881508.

It is not an unprimeable number, because it can be changed into a prime (72881597) 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, 12146922 + ... + 12146927.

It is an arithmetic number, because the mean of its divisors is an integer number (24293850).

Almost surely, 2^72881547 is an apocalyptic number.

72881547 is a deficient number, since it is larger than the sum of its proper divisors (24293853).

72881547 is a wasteful number, since it uses less digits than its factorization.

72881547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24293852.

The product of its digits is 125440, while the sum is 42.

The square root of 72881547 is about 8537.0689935129. The cubic root of 72881547 is about 417.7077446273.

The spelling of 72881547 in words is "seventy-two million, eight hundred eighty-one thousand, five hundred forty-seven".