68249651 has 2 divisors, whose sum is σ = 68249652. Its totient is φ = 68249650.

The previous prime is 68249647. The next prime is 68249663. The reversal of 68249651 is 15694286.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68249651 - 2² = 68249647 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 68249599 and 68249608.

It is not a weakly prime, because it can be changed into another prime (68249351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34124825 + 34124826.

It is an arithmetic number, because the mean of its divisors is an integer number (34124826).

Almost surely, 2^68249651 is an apocalyptic number.

68249651 is a deficient number, since it is larger than the sum of its proper divisors (1).

68249651 is an equidigital number, since it uses as much as digits as its factorization.

68249651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 41.

The square root of 68249651 is about 8261.3346984613. The cubic root of 68249651 is about 408.6644047001.

The spelling of 68249651 in words is "sixty-eight million, two hundred forty-nine thousand, six hundred fifty-one".