88842989 has 2 divisors, whose sum is σ = 88842990. Its totient is φ = 88842988.

The previous prime is 88842961. The next prime is 88842991. The reversal of 88842989 is 98924888.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72505225 + 16337764 = 8515^2 + 4042^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-88842989 is a prime.

It is a Sophie Germain prime.

Together with 88842991, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88848989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44421494 + 44421495.

It is an arithmetic number, because the mean of its divisors is an integer number (44421495).

Almost surely, 2^88842989 is an apocalyptic number.

It is an amenable number.

88842989 is a deficient number, since it is larger than the sum of its proper divisors (1).

88842989 is an equidigital number, since it uses as much as digits as its factorization.

88842989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2654208, while the sum is 56.

The square root of 88842989 is about 9425.6558922974. The cubic root of 88842989 is about 446.2118029171.

The spelling of 88842989 in words is "eighty-eight million, eight hundred forty-two thousand, nine hundred eighty-nine".