68909547 has 32 divisors (see below), whose sum is σ = 107688960. Its totient is φ = 38384640.

The previous prime is 68909531. The next prime is 68909549. The reversal of 68909547 is 74590986.

It is not a de Polignac number, because 68909547 - 2⁴ = 68909531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68909496 and 68909505.

It is not an unprimeable number, because it can be changed into a prime (68909549) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 168279 + ... + 168687.

It is an arithmetic number, because the mean of its divisors is an integer number (3365280).

Almost surely, 2^68909547 is an apocalyptic number.

68909547 is a deficient number, since it is larger than the sum of its proper divisors (38779413).

68909547 is a wasteful number, since it uses less digits than its factorization.

68909547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603.

The product of its (nonzero) digits is 544320, while the sum is 48.

The square root of 68909547 is about 8301.1774466036. The cubic root of 68909547 is about 409.9772880538.

The spelling of 68909547 in words is "sixty-eight million, nine hundred nine thousand, five hundred forty-seven".