73628521 has 2 divisors, whose sum is σ = 73628522. Its totient is φ = 73628520.

The previous prime is 73628509. The next prime is 73628549. The reversal of 73628521 is 12582637.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60668521 + 12960000 = 7789^2 + 3600^2 .

It is an emirp because it is prime and its reverse (12582637) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73628521 - 2¹³ = 73620329 is a prime.

It is not a weakly prime, because it can be changed into another prime (73628551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36814260 + 36814261.

It is an arithmetic number, because the mean of its divisors is an integer number (36814261).

Almost surely, 2^73628521 is an apocalyptic number.

It is an amenable number.

73628521 is a deficient number, since it is larger than the sum of its proper divisors (1).

73628521 is an equidigital number, since it uses as much as digits as its factorization.

73628521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 73628521 is about 8580.7063229084. The cubic root of 73628521 is about 419.1299468027.

The spelling of 73628521 in words is "seventy-three million, six hundred twenty-eight thousand, five hundred twenty-one".