68578949 has 2 divisors, whose sum is σ = 68578950. Its totient is φ = 68578948.

The previous prime is 68578931. The next prime is 68578963. The reversal of 68578949 is 94987586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38130625 + 30448324 = 6175^2 + 5518^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68578949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68578894 and 68578903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68578919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34289474 + 34289475.

It is an arithmetic number, because the mean of its divisors is an integer number (34289475).

Almost surely, 2^68578949 is an apocalyptic number.

It is an amenable number.

68578949 is a deficient number, since it is larger than the sum of its proper divisors (1).

68578949 is an equidigital number, since it uses as much as digits as its factorization.

68578949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 56.

The square root of 68578949 is about 8281.2407886741. The cubic root of 68578949 is about 409.3206059384.

The spelling of 68578949 in words is "sixty-eight million, five hundred seventy-eight thousand, nine hundred forty-nine".