81104377 has 2 divisors, whose sum is σ = 81104378. Its totient is φ = 81104376.

The previous prime is 81104249. The next prime is 81104383. The reversal of 81104377 is 77340118.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62346816 + 18757561 = 7896^2 + 4331^2 .

It is a cyclic number.

It is not a de Polignac number, because 81104377 - 2⁷ = 81104249 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (81104077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40552188 + 40552189.

It is an arithmetic number, because the mean of its divisors is an integer number (40552189).

Almost surely, 2^81104377 is an apocalyptic number.

It is an amenable number.

81104377 is a deficient number, since it is larger than the sum of its proper divisors (1).

81104377 is an equidigital number, since it uses as much as digits as its factorization.

81104377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 81104377 is about 9005.7968553593. The cubic root of 81104377 is about 432.8606403125.

The spelling of 81104377 in words is "eighty-one million, one hundred four thousand, three hundred seventy-seven".