72087647 has 2 divisors, whose sum is σ = 72087648. Its totient is φ = 72087646.

The previous prime is 72087643. The next prime is 72087677. The reversal of 72087647 is 74678027.

It is a weak prime.

It is an emirp because it is prime and its reverse (74678027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72087647 - 2² = 72087643 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72087643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36043823 + 36043824.

It is an arithmetic number, because the mean of its divisors is an integer number (36043824).

Almost surely, 2^72087647 is an apocalyptic number.

72087647 is a deficient number, since it is larger than the sum of its proper divisors (1).

72087647 is an equidigital number, since it uses as much as digits as its factorization.

72087647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 131712, while the sum is 41.

The square root of 72087647 is about 8490.4444524418. Note that the first 4 decimals coincide. The cubic root of 72087647 is about 416.1855045910.

The spelling of 72087647 in words is "seventy-two million, eighty-seven thousand, six hundred forty-seven".