89640377 has 2 divisors, whose sum is σ = 89640378. Its totient is φ = 89640376.

The previous prime is 89640373. The next prime is 89640379. The reversal of 89640377 is 77304698.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87067561 + 2572816 = 9331^2 + 1604^2 .

It is a cyclic number.

It is not a de Polignac number, because 89640377 - 2² = 89640373 is a prime.

Together with 89640379, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (89640373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44820188 + 44820189.

It is an arithmetic number, because the mean of its divisors is an integer number (44820189).

Almost surely, 2^89640377 is an apocalyptic number.

It is an amenable number.

89640377 is a deficient number, since it is larger than the sum of its proper divisors (1).

89640377 is an equidigital number, since it uses as much as digits as its factorization.

89640377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 89640377 is about 9467.8602123183. The cubic root of 89640377 is about 447.5427829637.

The spelling of 89640377 in words is "eighty-nine million, six hundred forty thousand, three hundred seventy-seven".