30988057 has 2 divisors, whose sum is σ = 30988058. Its totient is φ = 30988056.

The previous prime is 30988049. The next prime is 30988063. The reversal of 30988057 is 75088903.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26842761 + 4145296 = 5181^2 + 2036^2 .

It is an emirp because it is prime and its reverse (75088903) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30988057 - 2³ = 30988049 is a prime.

It is not a weakly prime, because it can be changed into another prime (30988007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15494028 + 15494029.

It is an arithmetic number, because the mean of its divisors is an integer number (15494029).

Almost surely, 2^30988057 is an apocalyptic number.

It is an amenable number.

30988057 is a deficient number, since it is larger than the sum of its proper divisors (1).

30988057 is an equidigital number, since it uses as much as digits as its factorization.

30988057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 30988057 is about 5566.6917464505. The cubic root of 30988057 is about 314.0977186497.

The spelling of 30988057 in words is "thirty million, nine hundred eighty-eight thousand, fifty-seven".