81024701 has 2 divisors, whose sum is σ = 81024702. Its totient is φ = 81024700.

The previous prime is 81024659. The next prime is 81024739. The reversal of 81024701 is 10742018.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55279225 + 25745476 = 7435^2 + 5074^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81024701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81024751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40512350 + 40512351.

It is an arithmetic number, because the mean of its divisors is an integer number (40512351).

Almost surely, 2^81024701 is an apocalyptic number.

It is an amenable number.

81024701 is a deficient number, since it is larger than the sum of its proper divisors (1).

81024701 is an equidigital number, since it uses as much as digits as its factorization.

81024701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 81024701 is about 9001.3721731745. The cubic root of 81024701 is about 432.7188481119.

Adding to 81024701 its reverse (10742018), we get a palindrome (91766719).

The spelling of 81024701 in words is "eighty-one million, twenty-four thousand, seven hundred one".