87783449 has 16 divisors (see below), whose sum is σ = 96484752. Its totient is φ = 79377408.

The previous prime is 87783431. The next prime is 87783469. The reversal of 87783449 is 94438778.

It can be written as a sum of positive squares in 8 ways, for example, as 4700224 + 83083225 = 2168^2 + 9115^2 .

It is a cyclic number.

It is not a de Polignac number, because 87783449 - 2¹² = 87779353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87783397 and 87783406.

It is not an unprimeable number, because it can be changed into a prime (87783469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220919 + ... + 221315.

It is an arithmetic number, because the mean of its divisors is an integer number (6030297).

Almost surely, 2^87783449 is an apocalyptic number.

It is an amenable number.

87783449 is a deficient number, since it is larger than the sum of its proper divisors (8701303).

87783449 is a wasteful number, since it uses less digits than its factorization.

87783449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716.

The product of its digits is 1354752, while the sum is 50.

The square root of 87783449 is about 9369.2822030292. The cubic root of 87783449 is about 444.4308660690.

The spelling of 87783449 in words is "eighty-seven million, seven hundred eighty-three thousand, four hundred forty-nine".