73406657 has 2 divisors, whose sum is σ = 73406658. Its totient is φ = 73406656.

The previous prime is 73406651. The next prime is 73406681. The reversal of 73406657 is 75660437.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57093136 + 16313521 = 7556^2 + 4039^2 .

It is an emirp because it is prime and its reverse (75660437) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73406657 - 2⁸ = 73406401 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73406657.

It is not a weakly prime, because it can be changed into another prime (73406651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36703328 + 36703329.

It is an arithmetic number, because the mean of its divisors is an integer number (36703329).

Almost surely, 2^73406657 is an apocalyptic number.

It is an amenable number.

73406657 is a deficient number, since it is larger than the sum of its proper divisors (1).

73406657 is an equidigital number, since it uses as much as digits as its factorization.

73406657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 38.

The square root of 73406657 is about 8567.7684959387. The cubic root of 73406657 is about 418.7085367129.

The spelling of 73406657 in words is "seventy-three million, four hundred six thousand, six hundred fifty-seven".