88081391 has 2 divisors, whose sum is σ = 88081392. Its totient is φ = 88081390.

The previous prime is 88081373. The next prime is 88081429. The reversal of 88081391 is 19318088.

It is an a-pointer prime, because the next prime (88081429) can be obtained adding 88081391 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-88081391 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88081361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44040695 + 44040696.

It is an arithmetic number, because the mean of its divisors is an integer number (44040696).

Almost surely, 2^88081391 is an apocalyptic number.

88081391 is a deficient number, since it is larger than the sum of its proper divisors (1).

88081391 is an equidigital number, since it uses as much as digits as its factorization.

88081391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 88081391 is about 9385.1686718993. The cubic root of 88081391 is about 444.9331061338.

The spelling of 88081391 in words is "eighty-eight million, eighty-one thousand, three hundred ninety-one".