68947551 has 16 divisors (see below), whose sum is σ = 103546720. Its totient is φ = 45334080.

The previous prime is 68947531. The next prime is 68947559. The reversal of 68947551 is 15574986.

68947551 is a `hidden beast` number, since 6 + 8 + 94 + 7 + 551 = 666.

It is not a de Polignac number, because 68947551 - 2⁷ = 68947423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68947497 and 68947506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68947559) 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 in 15 ways as a sum of consecutive naturals, for example, 15520 + ... + 19461.

It is an arithmetic number, because the mean of its divisors is an integer number (6471670).

Almost surely, 2^68947551 is an apocalyptic number.

68947551 is a deficient number, since it is larger than the sum of its proper divisors (34599169).

68947551 is a wasteful number, since it uses less digits than its factorization.

68947551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35063 (or 35057 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 68947551 is about 8303.4662039416. The cubic root of 68947551 is about 410.0526424574.

The spelling of 68947551 in words is "sixty-eight million, nine hundred forty-seven thousand, five hundred fifty-one".