30688157 has 2 divisors, whose sum is σ = 30688158. Its totient is φ = 30688156.

The previous prime is 30688139. The next prime is 30688199. The reversal of 30688157 is 75188603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30625156 + 63001 = 5534^2 + 251^2 .

It is a cyclic number.

It is not a de Polignac number, because 30688157 - 2¹² = 30684061 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30688157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30688057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15344078 + 15344079.

It is an arithmetic number, because the mean of its divisors is an integer number (15344079).

Almost surely, 2^30688157 is an apocalyptic number.

It is an amenable number.

30688157 is a deficient number, since it is larger than the sum of its proper divisors (1).

30688157 is an equidigital number, since it uses as much as digits as its factorization.

30688157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 30688157 is about 5539.6892512126. The cubic root of 30688157 is about 313.0811610957.

The spelling of 30688157 in words is "thirty million, six hundred eighty-eight thousand, one hundred fifty-seven".