8971945 has 8 divisors (see below), whose sum is σ = 11057544. Its totient is φ = 6983424.

The previous prime is 8971943. The next prime is 8971969. The reversal of 8971945 is 5491798.

It can be written as a sum of positive squares in 4 ways, for example, as 1115136 + 7856809 = 1056^2 + 2803^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8971945 - 2¹ = 8971943 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8971943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24064 + ... + 24433.

It is an arithmetic number, because the mean of its divisors is an integer number (1382193).

Almost surely, 2^8971945 is an apocalyptic number.

It is an amenable number.

8971945 is a deficient number, since it is larger than the sum of its proper divisors (2085599).

8971945 is a wasteful number, since it uses less digits than its factorization.

8971945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48539.

The product of its digits is 90720, while the sum is 43.

The square root of 8971945 is about 2995.3205170733. The cubic root of 8971945 is about 207.7920212168.

The spelling of 8971945 in words is "eight million, nine hundred seventy-one thousand, nine hundred forty-five".