73948309 has 2 divisors, whose sum is σ = 73948310. Its totient is φ = 73948308.

The previous prime is 73948279. The next prime is 73948313. The reversal of 73948309 is 90384937.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56700900 + 17247409 = 7530^2 + 4153^2 .

It is a cyclic number.

It is not a de Polignac number, because 73948309 - 2¹³ = 73940117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73948319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36974154 + 36974155.

It is an arithmetic number, because the mean of its divisors is an integer number (36974155).

Almost surely, 2^73948309 is an apocalyptic number.

It is an amenable number.

73948309 is a deficient number, since it is larger than the sum of its proper divisors (1).

73948309 is an equidigital number, since it uses as much as digits as its factorization.

73948309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 73948309 is about 8599.3202638348. The cubic root of 73948309 is about 419.7358675611.

The spelling of 73948309 in words is "seventy-three million, nine hundred forty-eight thousand, three hundred nine".