80681387 has 2 divisors, whose sum is σ = 80681388. Its totient is φ = 80681386.

The previous prime is 80681351. The next prime is 80681407. The reversal of 80681387 is 78318608.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80681387 - 2²² = 76487083 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80681987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40340693 + 40340694.

It is an arithmetic number, because the mean of its divisors is an integer number (40340694).

Almost surely, 2^80681387 is an apocalyptic number.

80681387 is a deficient number, since it is larger than the sum of its proper divisors (1).

80681387 is an equidigital number, since it uses as much as digits as its factorization.

80681387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 80681387 is about 8982.2818370390. The cubic root of 80681387 is about 432.1068176501.

The spelling of 80681387 in words is "eighty million, six hundred eighty-one thousand, three hundred eighty-seven".