88971221 has 2 divisors, whose sum is σ = 88971222. Its totient is φ = 88971220.

The previous prime is 88971187. The next prime is 88971229. The reversal of 88971221 is 12217988.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88096996 + 874225 = 9386^2 + 935^2 .

It is a cyclic number.

It is not a de Polignac number, because 88971221 - 2¹⁴ = 88954837 is a prime.

It is a Chen prime.

It is equal to p_5160998 and since 88971221 and 5160998 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88971229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44485610 + 44485611.

It is an arithmetic number, because the mean of its divisors is an integer number (44485611).

Almost surely, 2^88971221 is an apocalyptic number.

It is an amenable number.

88971221 is a deficient number, since it is larger than the sum of its proper divisors (1).

88971221 is an equidigital number, since it uses as much as digits as its factorization.

88971221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 38.

The square root of 88971221 is about 9432.4557247834. The cubic root of 88971221 is about 446.4263804382.

The spelling of 88971221 in words is "eighty-eight million, nine hundred seventy-one thousand, two hundred twenty-one".