88841821 has 2 divisors, whose sum is σ = 88841822. Its totient is φ = 88841820.

The previous prime is 88841807. The next prime is 88841839. The reversal of 88841821 is 12814888.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87048900 + 1792921 = 9330^2 + 1339^2 .

It is a cyclic number.

It is not a de Polignac number, because 88841821 - 2⁷ = 88841693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88841861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44420910 + 44420911.

It is an arithmetic number, because the mean of its divisors is an integer number (44420911).

Almost surely, 2^88841821 is an apocalyptic number.

It is an amenable number.

88841821 is a deficient number, since it is larger than the sum of its proper divisors (1).

88841821 is an equidigital number, since it uses as much as digits as its factorization.

88841821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32768, while the sum is 40.

The square root of 88841821 is about 9425.5939335407. The cubic root of 88841821 is about 446.2098474911.

The spelling of 88841821 in words is "eighty-eight million, eight hundred forty-one thousand, eight hundred twenty-one".