30697857 has 12 divisors (see below), whose sum is σ = 44528484. Its totient is φ = 20378880.

The previous prime is 30697853. The next prime is 30697861. The reversal of 30697857 is 75879603.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (30697853) and next prime (30697861).

It can be written as a sum of positive squares in 2 ways, for example, as 17564481 + 13133376 = 4191^2 + 3624^2 .

It is not a de Polignac number, because 30697857 - 2² = 30697853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30697853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4908 + ... + 9245.

It is an arithmetic number, because the mean of its divisors is an integer number (3710707).

Almost surely, 2^30697857 is an apocalyptic number.

It is an amenable number.

30697857 is a deficient number, since it is larger than the sum of its proper divisors (13830627).

30697857 is a wasteful number, since it uses less digits than its factorization.

30697857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14400 (or 14397 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 30697857 is about 5540.5646824128. The cubic root of 30697857 is about 313.1141441490.

The spelling of 30697857 in words is "thirty million, six hundred ninety-seven thousand, eight hundred fifty-seven".