87445977897 has 8 divisors (see below), whose sum is σ = 121663969344. Its totient is φ = 55762652528.

The previous prime is 87445977869. The next prime is 87445977911. The reversal of 87445977897 is 79877954478.

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 87445977897 - 2¹¹ = 87445975849 is a prime.

It is a super-2 number, since 2×87445977897² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87445977797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 633666438 + ... + 633666575.

It is an arithmetic number, because the mean of its divisors is an integer number (15207996168).

Almost surely, 2^87445977897 is an apocalyptic number.

It is an amenable number.

87445977897 is a deficient number, since it is larger than the sum of its proper divisors (34217991447).

87445977897 is a wasteful number, since it uses less digits than its factorization.

87445977897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267333039.

The product of its digits is 995742720, while the sum is 75.

The spelling of 87445977897 in words is "eighty-seven billion, four hundred forty-five million, nine hundred seventy-seven thousand, eight hundred ninety-seven".