72416501 has 2 divisors, whose sum is σ = 72416502. Its totient is φ = 72416500.

The previous prime is 72416483. The next prime is 72416503. The reversal of 72416501 is 10561427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38427601 + 33988900 = 6199^2 + 5830^2 .

It is an emirp because it is prime and its reverse (10561427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72416501 - 2²² = 68222197 is a prime.

Together with 72416503, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72416503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36208250 + 36208251.

It is an arithmetic number, because the mean of its divisors is an integer number (36208251).

Almost surely, 2^72416501 is an apocalyptic number.

It is an amenable number.

72416501 is a deficient number, since it is larger than the sum of its proper divisors (1).

72416501 is an equidigital number, since it uses as much as digits as its factorization.

72416501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 72416501 is about 8509.7885402635. The cubic root of 72416501 is about 416.8174051582.

Adding to 72416501 its reverse (10561427), we get a palindrome (82977928).

The spelling of 72416501 in words is "seventy-two million, four hundred sixteen thousand, five hundred one".