30400297 has 2 divisors, whose sum is σ = 30400298. Its totient is φ = 30400296.

The previous prime is 30400289. The next prime is 30400303. The reversal of 30400297 is 79200403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30074256 + 326041 = 5484^2 + 571^2 .

It is a cyclic number.

It is not a de Polignac number, because 30400297 - 2³ = 30400289 is a prime.

It is not a weakly prime, because it can be changed into another prime (30400597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15200148 + 15200149.

It is an arithmetic number, because the mean of its divisors is an integer number (15200149).

Almost surely, 2^30400297 is an apocalyptic number.

It is an amenable number.

30400297 is a deficient number, since it is larger than the sum of its proper divisors (1).

30400297 is an equidigital number, since it uses as much as digits as its factorization.

30400297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 30400297 is about 5513.6464340761. The cubic root of 30400297 is about 312.0991665105.

The spelling of 30400297 in words is "thirty million, four hundred thousand, two hundred ninety-seven".