89249987 has 2 divisors, whose sum is σ = 89249988. Its totient is φ = 89249986.

The previous prime is 89249981. The next prime is 89250037. The reversal of 89249987 is 78994298.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 89249987 - 2⁴ = 89249971 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (89249981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44624993 + 44624994.

It is an arithmetic number, because the mean of its divisors is an integer number (44624994).

Almost surely, 2^89249987 is an apocalyptic number.

89249987 is a deficient number, since it is larger than the sum of its proper divisors (1).

89249987 is an equidigital number, since it uses as much as digits as its factorization.

89249987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 56.

The square root of 89249987 is about 9447.2211258126. The cubic root of 89249987 is about 446.8921443339.

The spelling of 89249987 in words is "eighty-nine million, two hundred forty-nine thousand, nine hundred eighty-seven".