30986873 has 2 divisors, whose sum is σ = 30986874. Its totient is φ = 30986872.

The previous prime is 30986867. The next prime is 30986899. The reversal of 30986873 is 37868903.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29899024 + 1087849 = 5468^2 + 1043^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30986873 is a prime.

It is not a weakly prime, because it can be changed into another prime (30986803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15493436 + 15493437.

It is an arithmetic number, because the mean of its divisors is an integer number (15493437).

Almost surely, 2^30986873 is an apocalyptic number.

It is an amenable number.

30986873 is a deficient number, since it is larger than the sum of its proper divisors (1).

30986873 is an equidigital number, since it uses as much as digits as its factorization.

30986873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 30986873 is about 5566.5853986084. The cubic root of 30986873 is about 314.0937182221.

The spelling of 30986873 in words is "thirty million, nine hundred eighty-six thousand, eight hundred seventy-three".