72508071 has 4 divisors (see below), whose sum is σ = 96677432. Its totient is φ = 48338712.

The previous prime is 72508063. The next prime is 72508087. The reversal of 72508071 is 17080527.

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: 17080527 = 3 ⋅5693509.

It is not a de Polignac number, because 72508071 - 2³ = 72508063 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 (72508171) 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, 12084676 + ... + 12084681.

It is an arithmetic number, because the mean of its divisors is an integer number (24169358).

Almost surely, 2^72508071 is an apocalyptic number.

72508071 is a deficient number, since it is larger than the sum of its proper divisors (24169361).

72508071 is a wasteful number, since it uses less digits than its factorization.

72508071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24169360.

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 72508071 is about 8515.1671152127. The cubic root of 72508071 is about 416.9930184179.

Adding to 72508071 its reverse (17080527), we get a palindrome (89588598).

The spelling of 72508071 in words is "seventy-two million, five hundred eight thousand, seventy-one".