68428949 has 2 divisors, whose sum is σ = 68428950. Its totient is φ = 68428948.

The previous prime is 68428903. The next prime is 68428957. The reversal of 68428949 is 94982486.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57866449 + 10562500 = 7607^2 + 3250^2 .

It is a cyclic number.

It is not a de Polignac number, because 68428949 - 2²⁰ = 67380373 is a prime.

It is a super-2 number, since 2×68428949² = 9365042122489202, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 68428897 and 68428906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68418949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34214474 + 34214475.

It is an arithmetic number, because the mean of its divisors is an integer number (34214475).

Almost surely, 2^68428949 is an apocalyptic number.

It is an amenable number.

68428949 is a deficient number, since it is larger than the sum of its proper divisors (1).

68428949 is an equidigital number, since it uses as much as digits as its factorization.

68428949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 995328, while the sum is 50.

The square root of 68428949 is about 8272.1792171108. The cubic root of 68428949 is about 409.0219578800.

The spelling of 68428949 in words is "sixty-eight million, four hundred twenty-eight thousand, nine hundred forty-nine".