72067071 has 4 divisors (see below), whose sum is σ = 96089432. Its totient is φ = 48044712.

The previous prime is 72067067. The next prime is 72067081. The reversal of 72067071 is 17076027.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17076027 = 3 ⋅5692009.

It is not a de Polignac number, because 72067071 - 2² = 72067067 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72067031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12011176 + ... + 12011181.

It is an arithmetic number, because the mean of its divisors is an integer number (24022358).

Almost surely, 2^72067071 is an apocalyptic number.

72067071 is a deficient number, since it is larger than the sum of its proper divisors (24022361).

72067071 is a wasteful number, since it uses less digits than its factorization.

72067071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24022360.

The product of its (nonzero) digits is 4116, while the sum is 30.

The square root of 72067071 is about 8489.2326508348. The cubic root of 72067071 is about 416.1459035027.

The spelling of 72067071 in words is "seventy-two million, sixty-seven thousand, seventy-one".