88442621 has 2 divisors, whose sum is σ = 88442622. Its totient is φ = 88442620.

The previous prime is 88442591. The next prime is 88442623. The reversal of 88442621 is 12624488.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75446596 + 12996025 = 8686^2 + 3605^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-88442621 is a prime.

Together with 88442623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88442623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44221310 + 44221311.

It is an arithmetic number, because the mean of its divisors is an integer number (44221311).

Almost surely, 2^88442621 is an apocalyptic number.

It is an amenable number.

88442621 is a deficient number, since it is larger than the sum of its proper divisors (1).

88442621 is an equidigital number, since it uses as much as digits as its factorization.

88442621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24576, while the sum is 35.

The square root of 88442621 is about 9404.3937071988. The cubic root of 88442621 is about 445.5405139330.

The spelling of 88442621 in words is "eighty-eight million, four hundred forty-two thousand, six hundred twenty-one".