69872287 has 2 divisors, whose sum is σ = 69872288. Its totient is φ = 69872286.

The previous prime is 69872269. The next prime is 69872293. The reversal of 69872287 is 78227896.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69872287 is a prime.

It is a super-2 number, since 2×69872287² = 9764272981220738, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 69872287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69872207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34936143 + 34936144.

It is an arithmetic number, because the mean of its divisors is an integer number (34936144).

Almost surely, 2^69872287 is an apocalyptic number.

69872287 is a deficient number, since it is larger than the sum of its proper divisors (1).

69872287 is an equidigital number, since it uses as much as digits as its factorization.

69872287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 49.

The square root of 69872287 is about 8358.9644693586. The cubic root of 69872287 is about 411.8777384890.

It can be divided in two parts, 69 and 872287, that added together give a square (872356 = 934²).

The spelling of 69872287 in words is "sixty-nine million, eight hundred seventy-two thousand, two hundred eighty-seven".