87669247 has 4 divisors (see below), whose sum is σ = 87808816. Its totient is φ = 87529680.

The previous prime is 87669229. The next prime is 87669269. The reversal of 87669247 is 74296678.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74296678 = 2 ⋅37148339.

It is a cyclic number.

It is not a de Polignac number, because 87669247 - 2¹¹ = 87667199 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87669247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87679247) 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, 68838 + ... + 70099.

It is an arithmetic number, because the mean of its divisors is an integer number (21952204).

Almost surely, 2^87669247 is an apocalyptic number.

87669247 is a deficient number, since it is larger than the sum of its proper divisors (139569).

87669247 is a wasteful number, since it uses less digits than its factorization.

87669247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139568.

The product of its digits is 1016064, while the sum is 49.

The square root of 87669247 is about 9363.1857292270. The cubic root of 87669247 is about 444.2380547811.

The spelling of 87669247 in words is "eighty-seven million, six hundred sixty-nine thousand, two hundred forty-seven".