39730297 has 2 divisors, whose sum is σ = 39730298. Its totient is φ = 39730296.

The previous prime is 39730291. The next prime is 39730331. The reversal of 39730297 is 79203793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29419776 + 10310521 = 5424^2 + 3211^2 .

It is an emirp because it is prime and its reverse (79203793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39730297 - 2³ = 39730289 is a prime.

It is not a weakly prime, because it can be changed into another prime (39730291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19865148 + 19865149.

It is an arithmetic number, because the mean of its divisors is an integer number (19865149).

Almost surely, 2^39730297 is an apocalyptic number.

It is an amenable number.

39730297 is a deficient number, since it is larger than the sum of its proper divisors (1).

39730297 is an equidigital number, since it uses as much as digits as its factorization.

39730297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 71442, while the sum is 40.

The square root of 39730297 is about 6303.1973632435. The cubic root of 39730297 is about 341.2248125533.

The spelling of 39730297 in words is "thirty-nine million, seven hundred thirty thousand, two hundred ninety-seven".