88444621 has 2 divisors, whose sum is σ = 88444622. Its totient is φ = 88444620.

The previous prime is 88444613. The next prime is 88444633. The reversal of 88444621 is 12644488.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87422500 + 1022121 = 9350^2 + 1011^2 .

It is a cyclic number.

It is not a de Polignac number, because 88444621 - 2³ = 88444613 is a prime.

It is the 9405-th Hogben number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88444691) by changing a digit.

It is a nontrivial repunit in base 9404.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44222310 + 44222311.

It is an arithmetic number, because the mean of its divisors is an integer number (44222311).

Almost surely, 2^88444621 is an apocalyptic number.

It is an amenable number.

88444621 is a deficient number, since it is larger than the sum of its proper divisors (1).

88444621 is an equidigital number, since it uses as much as digits as its factorization.

88444621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49152, while the sum is 37.

The square root of 88444621 is about 9404.5000398745. The cubic root of 88444621 is about 445.5438723225.

The spelling of 88444621 in words is "eighty-eight million, four hundred forty-four thousand, six hundred twenty-one".