87827471449 has 9 divisors (see below), whose sum is σ = 89359093173. Its totient is φ = 86321681532.

The previous prime is 87827471429. The next prime is 87827471477. The reversal of 87827471449 is 94417472878.

It is a happy number.

The square root of 87827471449 is 296357.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 87827471449 - 2⁹ = 87827470937 is a prime.

It is a super-2 number, since 2×87827471449² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87827471429) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 17482552 + ... + 17487574.

Almost surely, 2^87827471449 is an apocalyptic number.

87827471449 is the 296357-th square number.

87827471449 is the 148179-th centered octagonal number.

It is an amenable number.

87827471449 is a deficient number, since it is larger than the sum of its proper divisors (1531621724).

87827471449 is an frugal number, since it uses more digits than its factorization.

87827471449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10164 (or 5082 counting only the distinct ones).

The product of its digits is 25288704, while the sum is 61.

The spelling of 87827471449 in words is "eighty-seven billion, eight hundred twenty-seven million, four hundred seventy-one thousand, four hundred forty-nine".