87715449 has 6 divisors (see below), whose sum is σ = 126700106. Its totient is φ = 58476960.

The previous prime is 87715421. The next prime is 87715469. The reversal of 87715449 is 94451778.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 86490000 + 1225449 = 9300^2 + 1107^2 .

It is not a de Polignac number, because 87715449 - 2⁵ = 87715417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87715469) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4873072 + ... + 4873089.

Almost surely, 2^87715449 is an apocalyptic number.

It is an amenable number.

87715449 is a deficient number, since it is larger than the sum of its proper divisors (38984657).

87715449 is a wasteful number, since it uses less digits than its factorization.

87715449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9746167 (or 9746164 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 87715449 is about 9365.6526200794. The cubic root of 87715449 is about 444.3160794128.

The spelling of 87715449 in words is "eighty-seven million, seven hundred fifteen thousand, four hundred forty-nine".