88621021 has 2 divisors, whose sum is σ = 88621022. Its totient is φ = 88621020.

The previous prime is 88620989. The next prime is 88621061. The reversal of 88621021 is 12012688.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49420900 + 39200121 = 7030^2 + 6261^2 .

It is a cyclic number.

It is not a de Polignac number, because 88621021 - 2⁵ = 88620989 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88621061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44310510 + 44310511.

It is an arithmetic number, because the mean of its divisors is an integer number (44310511).

Almost surely, 2^88621021 is an apocalyptic number.

It is an amenable number.

88621021 is a deficient number, since it is larger than the sum of its proper divisors (1).

88621021 is an equidigital number, since it uses as much as digits as its factorization.

88621021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 88621021 is about 9413.8738572386. The cubic root of 88621021 is about 445.8398833366.

The spelling of 88621021 in words is "eighty-eight million, six hundred twenty-one thousand, twenty-one".