30191137 has 2 divisors, whose sum is σ = 30191138. Its totient is φ = 30191136.

The previous prime is 30191123. The next prime is 30191141. The reversal of 30191137 is 73119103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17969121 + 12222016 = 4239^2 + 3496^2 .

It is a cyclic number.

It is not a de Polignac number, because 30191137 - 2¹⁵ = 30158369 is a prime.

It is not a weakly prime, because it can be changed into another prime (30191237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15095568 + 15095569.

It is an arithmetic number, because the mean of its divisors is an integer number (15095569).

Almost surely, 2^30191137 is an apocalyptic number.

It is an amenable number.

30191137 is a deficient number, since it is larger than the sum of its proper divisors (1).

30191137 is an equidigital number, since it uses as much as digits as its factorization.

30191137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 567, while the sum is 25.

The square root of 30191137 is about 5494.6462124508. The cubic root of 30191137 is about 311.3817508601.

The spelling of 30191137 in words is "thirty million, one hundred ninety-one thousand, one hundred thirty-seven".