72027391 has 2 divisors, whose sum is σ = 72027392. Its totient is φ = 72027390.

The previous prime is 72027379. The next prime is 72027401. The reversal of 72027391 is 19372027.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72027391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72027331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36013695 + 36013696.

It is an arithmetic number, because the mean of its divisors is an integer number (36013696).

Almost surely, 2^72027391 is an apocalyptic number.

72027391 is a deficient number, since it is larger than the sum of its proper divisors (1).

72027391 is an equidigital number, since it uses as much as digits as its factorization.

72027391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 72027391 is about 8486.8952509148. The cubic root of 72027391 is about 416.0695130849.

The spelling of 72027391 in words is "seventy-two million, twenty-seven thousand, three hundred ninety-one".