30397491 has 8 divisors (see below), whose sum is σ = 45033360. Its totient is φ = 20264976.

The previous prime is 30397489. The next prime is 30397501. The reversal of 30397491 is 19479303.

It is not a de Polignac number, because 30397491 - 2¹ = 30397489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30397291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 562890 + ... + 562943.

It is an arithmetic number, because the mean of its divisors is an integer number (5629170).

Almost surely, 2^30397491 is an apocalyptic number.

30397491 is a deficient number, since it is larger than the sum of its proper divisors (14635869).

30397491 is a wasteful number, since it uses less digits than its factorization.

30397491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125842 (or 1125836 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 30397491 is about 5513.3919686523. The cubic root of 30397491 is about 312.0895637841.

The spelling of 30397491 in words is "thirty million, three hundred ninety-seven thousand, four hundred ninety-one".