88045781 has 2 divisors, whose sum is σ = 88045782. Its totient is φ = 88045780.

The previous prime is 88045777. The next prime is 88045823. The reversal of 88045781 is 18754088.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84180625 + 3865156 = 9175^2 + 1966^2 .

It is a cyclic number.

It is not a de Polignac number, because 88045781 - 2² = 88045777 is a prime.

It is a super-2 number, since 2×88045781² = 15504119103799922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88045721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44022890 + 44022891.

It is an arithmetic number, because the mean of its divisors is an integer number (44022891).

Almost surely, 2^88045781 is an apocalyptic number.

It is an amenable number.

88045781 is a deficient number, since it is larger than the sum of its proper divisors (1).

88045781 is an equidigital number, since it uses as much as digits as its factorization.

88045781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 71680, while the sum is 41.

The square root of 88045781 is about 9383.2713378651. The cubic root of 88045781 is about 444.8731380998.

The spelling of 88045781 in words is "eighty-eight million, forty-five thousand, seven hundred eighty-one".