87290449 has 4 divisors (see below), whose sum is σ = 87671860. Its totient is φ = 86909040.

The previous prime is 87290443. The next prime is 87290459. The reversal of 87290449 is 94409278.

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 38192400 + 49098049 = 6180^2 + 7007^2 .

It is a cyclic number.

It is not a de Polignac number, because 87290449 - 2¹⁷ = 87159377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87290443) 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, 190362 + ... + 190819.

It is an arithmetic number, because the mean of its divisors is an integer number (21917965).

Almost surely, 2^87290449 is an apocalyptic number.

It is an amenable number.

87290449 is a deficient number, since it is larger than the sum of its proper divisors (381411).

87290449 is a wasteful number, since it uses less digits than its factorization.

87290449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381410.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 87290449 is about 9342.9357805778. The cubic root of 87290449 is about 443.5973153473.

The spelling of 87290449 in words is "eighty-seven million, two hundred ninety thousand, four hundred forty-nine".