67249649 has 2 divisors, whose sum is σ = 67249650. Its totient is φ = 67249648.

The previous prime is 67249643. The next prime is 67249657. The reversal of 67249649 is 94694276.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63760225 + 3489424 = 7985^2 + 1868^2 .

It is a cyclic number.

It is not a de Polignac number, because 67249649 - 2¹² = 67245553 is a prime.

It is not a weakly prime, because it can be changed into another prime (67249643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33624824 + 33624825.

It is an arithmetic number, because the mean of its divisors is an integer number (33624825).

Almost surely, 2^67249649 is an apocalyptic number.

It is an amenable number.

67249649 is a deficient number, since it is larger than the sum of its proper divisors (1).

67249649 is an equidigital number, since it uses as much as digits as its factorization.

67249649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 47.

The square root of 67249649 is about 8200.5883325527. The cubic root of 67249649 is about 406.6586432022.

The spelling of 67249649 in words is "sixty-seven million, two hundred forty-nine thousand, six hundred forty-nine".