81925303 has 2 divisors, whose sum is σ = 81925304. Its totient is φ = 81925302.

The previous prime is 81925279. The next prime is 81925309. The reversal of 81925303 is 30352918.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81925303 - 2¹⁷ = 81794231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81925309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40962651 + 40962652.

It is an arithmetic number, because the mean of its divisors is an integer number (40962652).

Almost surely, 2^81925303 is an apocalyptic number.

81925303 is a deficient number, since it is larger than the sum of its proper divisors (1).

81925303 is an equidigital number, since it uses as much as digits as its factorization.

81925303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 81925303 is about 9051.2597465767. The cubic root of 81925303 is about 434.3161899091.

It can be divided in two parts, 81925 and 303, that added together give a palindrome (82228).

The spelling of 81925303 in words is "eighty-one million, nine hundred twenty-five thousand, three hundred three".