89785639 has 2 divisors, whose sum is σ = 89785640. Its totient is φ = 89785638.

The previous prime is 89785607. The next prime is 89785673. The reversal of 89785639 is 93658798.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 89785639 - 2⁵ = 89785607 is a prime.

It is a super-2 number, since 2×89785639² = 16122921941276642, 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 89785639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89785699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44892819 + 44892820.

It is an arithmetic number, because the mean of its divisors is an integer number (44892820).

Almost surely, 2^89785639 is an apocalyptic number.

89785639 is a deficient number, since it is larger than the sum of its proper divisors (1).

89785639 is an equidigital number, since it uses as much as digits as its factorization.

89785639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 55.

The square root of 89785639 is about 9475.5284285363. The cubic root of 89785639 is about 447.7843998065.

The spelling of 89785639 in words is "eighty-nine million, seven hundred eighty-five thousand, six hundred thirty-nine".