30472397 has 2 divisors, whose sum is σ = 30472398. Its totient is φ = 30472396.

The previous prime is 30472369. The next prime is 30472427. The reversal of 30472397 is 79327403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18438436 + 12033961 = 4294^2 + 3469^2 .

It is an emirp because it is prime and its reverse (79327403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30472397 - 2¹⁸ = 30210253 is a prime.

It is a Chen prime.

It is equal to p_1885328 and since 30472397 and 1885328 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30472327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15236198 + 15236199.

It is an arithmetic number, because the mean of its divisors is an integer number (15236199).

Almost surely, 2^30472397 is an apocalyptic number.

It is an amenable number.

30472397 is a deficient number, since it is larger than the sum of its proper divisors (1).

30472397 is an equidigital number, since it uses as much as digits as its factorization.

30472397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 35.

The square root of 30472397 is about 5520.1808847175. The cubic root of 30472397 is about 312.3457055909.

The spelling of 30472397 in words is "thirty million, four hundred seventy-two thousand, three hundred ninety-seven".