89451971 has 4 divisors (see below), whose sum is σ = 102230832. Its totient is φ = 76673112.

The previous prime is 89451961. The next prime is 89451983. The reversal of 89451971 is 17915498.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17915498 = 2 ⋅8957749.

It is a cyclic number.

It is not a de Polignac number, because 89451971 - 2¹⁰ = 89450947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89451931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6389420 + ... + 6389433.

It is an arithmetic number, because the mean of its divisors is an integer number (25557708).

Almost surely, 2^89451971 is an apocalyptic number.

89451971 is a deficient number, since it is larger than the sum of its proper divisors (12778861).

89451971 is a wasteful number, since it uses less digits than its factorization.

89451971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12778860.

The product of its digits is 90720, while the sum is 44.

The square root of 89451971 is about 9457.9052120435. The cubic root of 89451971 is about 447.2290148017.

The spelling of 89451971 in words is "eighty-nine million, four hundred fifty-one thousand, nine hundred seventy-one".