30897253 has 2 divisors, whose sum is σ = 30897254. Its totient is φ = 30897252.

The previous prime is 30897247. The next prime is 30897277. The reversal of 30897253 is 35279803.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16136289 + 14760964 = 4017^2 + 3842^2 .

It is a cyclic number.

It is not a de Polignac number, because 30897253 - 2⁵ = 30897221 is a prime.

It is a super-3 number, since 3×30897253³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30897233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15448626 + 15448627.

It is an arithmetic number, because the mean of its divisors is an integer number (15448627).

Almost surely, 2^30897253 is an apocalyptic number.

It is an amenable number.

30897253 is a deficient number, since it is larger than the sum of its proper divisors (1).

30897253 is an equidigital number, since it uses as much as digits as its factorization.

30897253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 30897253 is about 5558.5297516520. The cubic root of 30897253 is about 313.7906193343.

The spelling of 30897253 in words is "thirty million, eight hundred ninety-seven thousand, two hundred fifty-three".