73947761 has 2 divisors, whose sum is σ = 73947762. Its totient is φ = 73947760.

The previous prime is 73947749. The next prime is 73947787. The reversal of 73947761 is 16774937.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52649536 + 21298225 = 7256^2 + 4615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73947761 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (73941761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36973880 + 36973881.

It is an arithmetic number, because the mean of its divisors is an integer number (36973881).

Almost surely, 2^73947761 is an apocalyptic number.

It is an amenable number.

73947761 is a deficient number, since it is larger than the sum of its proper divisors (1).

73947761 is an equidigital number, since it uses as much as digits as its factorization.

73947761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 222264, while the sum is 44.

The square root of 73947761 is about 8599.2884007922. The cubic root of 73947761 is about 419.7348307295.

The spelling of 73947761 in words is "seventy-three million, nine hundred forty-seven thousand, seven hundred sixty-one".