89742971 has 2 divisors, whose sum is σ = 89742972. Its totient is φ = 89742970.

The previous prime is 89742967. The next prime is 89743001. The reversal of 89742971 is 17924798.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 89742971 - 2² = 89742967 is a prime.

It is not a weakly prime, because it can be changed into another prime (89742901) 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, 44871485 + 44871486.

It is an arithmetic number, because the mean of its divisors is an integer number (44871486).

Almost surely, 2^89742971 is an apocalyptic number.

89742971 is a deficient number, since it is larger than the sum of its proper divisors (1).

89742971 is an equidigital number, since it uses as much as digits as its factorization.

89742971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 47.

The square root of 89742971 is about 9473.2766770532. The cubic root of 89742971 is about 447.7134564191.

The spelling of 89742971 in words is "eighty-nine million, seven hundred forty-two thousand, nine hundred seventy-one".