30989297 has 4 divisors (see below), whose sum is σ = 31009140. Its totient is φ = 30969456.

The previous prime is 30989293. The next prime is 30989311. The reversal of 30989297 is 79298903.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9096256 + 21893041 = 3016^2 + 4679^2 .

It is a cyclic number.

It is not a de Polignac number, because 30989297 - 2² = 30989293 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30989291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7358 + ... + 10775.

It is an arithmetic number, because the mean of its divisors is an integer number (7752285).

Almost surely, 2^30989297 is an apocalyptic number.

It is an amenable number.

30989297 is a deficient number, since it is larger than the sum of its proper divisors (19843).

30989297 is a wasteful number, since it uses less digits than its factorization.

30989297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19842.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 30989297 is about 5566.8031220800. The cubic root of 30989297 is about 314.1019081775.

The spelling of 30989297 in words is "thirty million, nine hundred eighty-nine thousand, two hundred ninety-seven".