89447957 has 4 divisors (see below), whose sum is σ = 89509836. Its totient is φ = 89386080.

The previous prime is 89447951. The next prime is 89447959. The reversal of 89447957 is 75974498.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28826161 + 60621796 = 5369^2 + 7786^2 .

It is a cyclic number.

It is not a de Polignac number, because 89447957 - 2⁶ = 89447893 is a prime.

It is a super-2 number, since 2×89447957² = 16001874022947698, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 89447899 and 89447908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89447951) 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, 28718 + ... + 31679.

It is an arithmetic number, because the mean of its divisors is an integer number (22377459).

Almost surely, 2^89447957 is an apocalyptic number.

It is an amenable number.

89447957 is a deficient number, since it is larger than the sum of its proper divisors (61879).

89447957 is a wasteful number, since it uses less digits than its factorization.

89447957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61878.

The product of its digits is 2540160, while the sum is 53.

The square root of 89447957 is about 9457.6930062251. The cubic root of 89447957 is about 447.2223251629. Note that the first 3 decimals are identical.

The spelling of 89447957 in words is "eighty-nine million, four hundred forty-seven thousand, nine hundred fifty-seven".