72073381 has 8 divisors (see below), whose sum is σ = 75258720. Its totient is φ = 68934768.

The previous prime is 72073349. The next prime is 72073423. The reversal of 72073381 is 18337027.

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 72073381 - 2⁵ = 72073349 is a prime.

It is a super-2 number, since 2×72073381² = 10389144497542322, 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 (72073301) 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 7 ways as a sum of consecutive naturals, for example, 8511 + ... + 14716.

It is an arithmetic number, because the mean of its divisors is an integer number (9407340).

Almost surely, 2^72073381 is an apocalyptic number.

It is an amenable number.

72073381 is a deficient number, since it is larger than the sum of its proper divisors (3185339).

72073381 is a wasteful number, since it uses less digits than its factorization.

72073381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23363.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 72073381 is about 8489.6042899537. The cubic root of 72073381 is about 416.1580486890.

The spelling of 72073381 in words is "seventy-two million, seventy-three thousand, three hundred eighty-one".