72688741 has 2 divisors, whose sum is σ = 72688742. Its totient is φ = 72688740.

The previous prime is 72688739. The next prime is 72688783. The reversal of 72688741 is 14788627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61936900 + 10751841 = 7870^2 + 3279^2 .

It is a cyclic number.

It is not a de Polignac number, because 72688741 - 2¹ = 72688739 is a prime.

Together with 72688739, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72688241) 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 as a sum of consecutive naturals, namely, 36344370 + 36344371.

It is an arithmetic number, because the mean of its divisors is an integer number (36344371).

Almost surely, 2^72688741 is an apocalyptic number.

It is an amenable number.

72688741 is a deficient number, since it is larger than the sum of its proper divisors (1).

72688741 is an equidigital number, since it uses as much as digits as its factorization.

72688741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 150528, while the sum is 43.

The square root of 72688741 is about 8525.7692321573. The cubic root of 72688741 is about 417.3390747956.

The spelling of 72688741 in words is "seventy-two million, six hundred eighty-eight thousand, seven hundred forty-one".