87785449 has 4 divisors (see below), whose sum is σ = 87834240. Its totient is φ = 87736660.

The previous prime is 87785441. The next prime is 87785461. The reversal of 87785449 is 94458778.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87785449 - 2³ = 87785441 is a prime.

It is a super-2 number, since 2×87785449² = 15412570112263202, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87785396 and 87785405.

It is not an unprimeable number, because it can be changed into a prime (87785441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21589 + ... + 25330.

It is an arithmetic number, because the mean of its divisors is an integer number (21958560).

Almost surely, 2^87785449 is an apocalyptic number.

It is an amenable number.

87785449 is a deficient number, since it is larger than the sum of its proper divisors (48791).

87785449 is a wasteful number, since it uses less digits than its factorization.

87785449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48790.

The product of its digits is 2257920, while the sum is 52.

The square root of 87785449 is about 9369.3889341835. The cubic root of 87785449 is about 444.4342412496.

The spelling of 87785449 in words is "eighty-seven million, seven hundred eighty-five thousand, four hundred forty-nine".