88821919 has 2 divisors, whose sum is σ = 88821920. Its totient is φ = 88821918.

The previous prime is 88821907. The next prime is 88822003. The reversal of 88821919 is 91912888.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 88821919 - 2⁹ = 88821407 is a prime.

It is a super-2 number, since 2×88821919² = 15778666589685122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88821419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44410959 + 44410960.

It is an arithmetic number, because the mean of its divisors is an integer number (44410960).

Almost surely, 2^88821919 is an apocalyptic number.

88821919 is a deficient number, since it is larger than the sum of its proper divisors (1).

88821919 is an equidigital number, since it uses as much as digits as its factorization.

88821919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 46.

The square root of 88821919 is about 9424.5381319193. The cubic root of 88821919 is about 446.1765256033.

It can be divided in two parts, 8882 and 1919, that added together give a palindrome (10801).

The spelling of 88821919 in words is "eighty-eight million, eight hundred twenty-one thousand, nine hundred nineteen".