72040687 has 2 divisors, whose sum is σ = 72040688. Its totient is φ = 72040686.

The previous prime is 72040681. The next prime is 72040691. The reversal of 72040687 is 78604027.

It is a strong prime.

It is an emirp because it is prime and its reverse (78604027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72040687 - 2¹⁵ = 72007919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72040681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36020343 + 36020344.

It is an arithmetic number, because the mean of its divisors is an integer number (36020344).

Almost surely, 2^72040687 is an apocalyptic number.

72040687 is a deficient number, since it is larger than the sum of its proper divisors (1).

72040687 is an equidigital number, since it uses as much as digits as its factorization.

72040687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 72040687 is about 8487.6785400956. The cubic root of 72040687 is about 416.0951131601.

It can be divided in two parts, 72040 and 687, that added together give a palindrome (72727).

The spelling of 72040687 in words is "seventy-two million, forty thousand, six hundred eighty-seven".