68981047 has 2 divisors, whose sum is σ = 68981048. Its totient is φ = 68981046.

The previous prime is 68981041. The next prime is 68981083. The reversal of 68981047 is 74018986.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68981047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68980994 and 68981012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68981041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34490523 + 34490524.

It is an arithmetic number, because the mean of its divisors is an integer number (34490524).

Almost surely, 2^68981047 is an apocalyptic number.

68981047 is a deficient number, since it is larger than the sum of its proper divisors (1).

68981047 is an equidigital number, since it uses as much as digits as its factorization.

68981047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 68981047 is about 8305.4829480290. The cubic root of 68981047 is about 410.1190354351.

The spelling of 68981047 in words is "sixty-eight million, nine hundred eighty-one thousand, forty-seven".