30520997 has 8 divisors (see below), whose sum is σ = 33110616. Its totient is φ = 27965952.

The previous prime is 30520993. The next prime is 30520999. The reversal of 30520997 is 79902503.

It can be written as a sum of positive squares in 4 ways, for example, as 391876 + 30129121 = 626^2 + 5489^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30520997 - 2² = 30520993 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30520991) 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, 6788 + ... + 10349.

It is an arithmetic number, because the mean of its divisors is an integer number (4138827).

Almost surely, 2^30520997 is an apocalyptic number.

It is an amenable number.

30520997 is a deficient number, since it is larger than the sum of its proper divisors (2589619).

30520997 is a wasteful number, since it uses less digits than its factorization.

30520997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17287.

The product of its (nonzero) digits is 17010, while the sum is 35.

The square root of 30520997 is about 5524.5811605949. The cubic root of 30520997 is about 312.5116693242.

The spelling of 30520997 in words is "thirty million, five hundred twenty thousand, nine hundred ninety-seven".