68978347 has 2 divisors, whose sum is σ = 68978348. Its totient is φ = 68978346.

The previous prime is 68978291. The next prime is 68978363. The reversal of 68978347 is 74387986.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68978347 - 2¹⁹ = 68454059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68978294 and 68978303.

It is not a weakly prime, because it can be changed into another prime (68972347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34489173 + 34489174.

It is an arithmetic number, because the mean of its divisors is an integer number (34489174).

Almost surely, 2^68978347 is an apocalyptic number.

68978347 is a deficient number, since it is larger than the sum of its proper divisors (1).

68978347 is an equidigital number, since it uses as much as digits as its factorization.

68978347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 52.

The square root of 68978347 is about 8305.3204032114. The cubic root of 68978347 is about 410.1136845168.

The spelling of 68978347 in words is "sixty-eight million, nine hundred seventy-eight thousand, three hundred forty-seven".