72074971 has 4 divisors (see below), whose sum is σ = 72774832. Its totient is φ = 71375112.

The previous prime is 72074963. The next prime is 72074983. The reversal of 72074971 is 17947027.

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 72074971 - 2³ = 72074963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72074971.

It is not an unprimeable number, because it can be changed into a prime (72074911) 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, 349776 + ... + 349981.

It is an arithmetic number, because the mean of its divisors is an integer number (18193708).

Almost surely, 2^72074971 is an apocalyptic number.

72074971 is a deficient number, since it is larger than the sum of its proper divisors (699861).

72074971 is a wasteful number, since it uses less digits than its factorization.

72074971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699860.

The product of its (nonzero) digits is 24696, while the sum is 37.

The square root of 72074971 is about 8489.6979333778. The cubic root of 72074971 is about 416.1611089332.

The spelling of 72074971 in words is "seventy-two million, seventy-four thousand, nine hundred seventy-one".