73947649 has 2 divisors, whose sum is σ = 73947650. Its totient is φ = 73947648.

The previous prime is 73947631. The next prime is 73947689. The reversal of 73947649 is 94674937.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65286400 + 8661249 = 8080^2 + 2943^2 .

It is a cyclic number.

It is not a de Polignac number, because 73947649 - 2¹¹ = 73945601 is a prime.

It is not a weakly prime, because it can be changed into another prime (73947619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36973824 + 36973825.

It is an arithmetic number, because the mean of its divisors is an integer number (36973825).

Almost surely, 2^73947649 is an apocalyptic number.

It is an amenable number.

73947649 is a deficient number, since it is larger than the sum of its proper divisors (1).

73947649 is an equidigital number, since it uses as much as digits as its factorization.

73947649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 49.

The square root of 73947649 is about 8599.2818886230. The cubic root of 73947649 is about 419.7346188217.

The spelling of 73947649 in words is "seventy-three million, nine hundred forty-seven thousand, six hundred forty-nine".