89739919 has 2 divisors, whose sum is σ = 89739920. Its totient is φ = 89739918.

The previous prime is 89739901. The next prime is 89739931. The reversal of 89739919 is 91993798.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89739919 - 2⁵ = 89739887 is a prime.

It is a super-2 number, since 2×89739919² = 16106506124253122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 89739919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89739989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44869959 + 44869960.

It is an arithmetic number, because the mean of its divisors is an integer number (44869960).

Almost surely, 2^89739919 is an apocalyptic number.

89739919 is a deficient number, since it is larger than the sum of its proper divisors (1).

89739919 is an equidigital number, since it uses as much as digits as its factorization.

89739919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1102248, while the sum is 55.

The square root of 89739919 is about 9473.1155909764. The cubic root of 89739919 is about 447.7083810468.

The spelling of 89739919 in words is "eighty-nine million, seven hundred thirty-nine thousand, nine hundred nineteen".