73570649 has 2 divisors, whose sum is σ = 73570650. Its totient is φ = 73570648.

The previous prime is 73570643. The next prime is 73570663. The reversal of 73570649 is 94607537.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50865424 + 22705225 = 7132^2 + 4765^2 .

It is an emirp because it is prime and its reverse (94607537) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73570649 - 2⁴ = 73570633 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (73570643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36785324 + 36785325.

It is an arithmetic number, because the mean of its divisors is an integer number (36785325).

Almost surely, 2^73570649 is an apocalyptic number.

It is an amenable number.

73570649 is a deficient number, since it is larger than the sum of its proper divisors (1).

73570649 is an equidigital number, since it uses as much as digits as its factorization.

73570649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 158760, while the sum is 41.

The square root of 73570649 is about 8577.3334434427. Note that the first 3 decimals coincide. The cubic root of 73570649 is about 419.0201060065.

The spelling of 73570649 in words is "seventy-three million, five hundred seventy thousand, six hundred forty-nine".