8897946989 has 4 divisors (see below), whose sum is σ = 8898254460. Its totient is φ = 8897639520.

The previous prime is 8897946971. The next prime is 8897946991. The reversal of 8897946989 is 9896497988.

It is a happy number.

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 5206776964 + 3691170025 = 72158^2 + 60755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8897946989 is a prime.

It is a super-2 number, since 2×8897946989² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8897946919) 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, 105224 + ... + 169905.

It is an arithmetic number, because the mean of its divisors is an integer number (2224563615).

Almost surely, 2^8897946989 is an apocalyptic number.

It is an amenable number.

8897946989 is a deficient number, since it is larger than the sum of its proper divisors (307471).

8897946989 is a wasteful number, since it uses less digits than its factorization.

8897946989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307470.

The product of its digits is 564350976, while the sum is 77.

The square root of 8897946989 is about 94328.9297564644. The cubic root of 8897946989 is about 2072.1917390037.

The spelling of 8897946989 in words is "eight billion, eight hundred ninety-seven million, nine hundred forty-six thousand, nine hundred eighty-nine".