30638197 has 2 divisors, whose sum is σ = 30638198. Its totient is φ = 30638196.

The previous prime is 30638189. The next prime is 30638207. The reversal of 30638197 is 79183603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23872996 + 6765201 = 4886^2 + 2601^2 .

It is a cyclic number.

It is not a de Polignac number, because 30638197 - 2³ = 30638189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30638117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15319098 + 15319099.

It is an arithmetic number, because the mean of its divisors is an integer number (15319099).

Almost surely, 2^30638197 is an apocalyptic number.

It is an amenable number.

30638197 is a deficient number, since it is larger than the sum of its proper divisors (1).

30638197 is an equidigital number, since it uses as much as digits as its factorization.

30638197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 30638197 is about 5535.1781362482. The cubic root of 30638197 is about 312.9111711918.

It can be divided in two parts, 306 and 38197, that added together give a triangular number (38503 = T₂₇₇).

The spelling of 30638197 in words is "thirty million, six hundred thirty-eight thousand, one hundred ninety-seven".