89437819 has 2 divisors, whose sum is σ = 89437820. Its totient is φ = 89437818.

The previous prime is 89437813. The next prime is 89437841. The reversal of 89437819 is 91873498.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 89437819 - 2³ = 89437811 is a prime.

It is a super-2 number, since 2×89437819² = 15998246934953522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (89437811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44718909 + 44718910.

It is an arithmetic number, because the mean of its divisors is an integer number (44718910).

Almost surely, 2^89437819 is an apocalyptic number.

89437819 is a deficient number, since it is larger than the sum of its proper divisors (1).

89437819 is an equidigital number, since it uses as much as digits as its factorization.

89437819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 49.

The square root of 89437819 is about 9457.1570252376. The cubic root of 89437819 is about 447.2054285175.

The spelling of 89437819 in words is "eighty-nine million, four hundred thirty-seven thousand, eight hundred nineteen".