30870397 has 2 divisors, whose sum is σ = 30870398. Its totient is φ = 30870396.

The previous prime is 30870391. The next prime is 30870457. The reversal of 30870397 is 79307803.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22838841 + 8031556 = 4779^2 + 2834^2 .

It is an emirp because it is prime and its reverse (79307803) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30870397 - 2¹¹ = 30868349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30870391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15435198 + 15435199.

It is an arithmetic number, because the mean of its divisors is an integer number (15435199).

Almost surely, 2^30870397 is an apocalyptic number.

It is an amenable number.

30870397 is a deficient number, since it is larger than the sum of its proper divisors (1).

30870397 is an equidigital number, since it uses as much as digits as its factorization.

30870397 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 37.

The square root of 30870397 is about 5556.1134797626. The cubic root of 30870397 is about 313.6996770134.

The spelling of 30870397 in words is "thirty million, eight hundred seventy thousand, three hundred ninety-seven".