87449949 has 10 divisors (see below), whose sum is σ = 130635230. Its totient is φ = 58299912.

The previous prime is 87449927. The next prime is 87449963. The reversal of 87449949 is 94994478.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 81324324 + 6125625 = 9018^2 + 2475^2 .

It is not a de Polignac number, because 87449949 - 2²¹ = 85352797 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87449895 and 87449904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87449249) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 539734 + ... + 539895.

It is an arithmetic number, because the mean of its divisors is an integer number (13063523).

Almost surely, 2^87449949 is an apocalyptic number.

It is an amenable number.

87449949 is a deficient number, since it is larger than the sum of its proper divisors (43185281).

87449949 is a wasteful number, since it uses less digits than its factorization.

87449949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079641 (or 1079632 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 87449949 is about 9351.4677457606. The cubic root of 87449949 is about 443.8673361868.

The spelling of 87449949 in words is "eighty-seven million, four hundred forty-nine thousand, nine hundred forty-nine".