73947749 has 2 divisors, whose sum is σ = 73947750. Its totient is φ = 73947748.

The previous prime is 73947703. The next prime is 73947761. The reversal of 73947749 is 94774937.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73650724 + 297025 = 8582^2 + 545^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73947749 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 73947697 and 73947706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73947649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36973874 + 36973875.

It is an arithmetic number, because the mean of its divisors is an integer number (36973875).

Almost surely, 2^73947749 is an apocalyptic number.

It is an amenable number.

73947749 is a deficient number, since it is larger than the sum of its proper divisors (1).

73947749 is an equidigital number, since it uses as much as digits as its factorization.

73947749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1333584, while the sum is 50.

The square root of 73947749 is about 8599.2877030601. The cubic root of 73947749 is about 419.7348080251.

The spelling of 73947749 in words is "seventy-three million, nine hundred forty-seven thousand, seven hundred forty-nine".