30890929 has 2 divisors, whose sum is σ = 30890930. Its totient is φ = 30890928.

The previous prime is 30890869. The next prime is 30890933. The reversal of 30890929 is 92909803.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26501904 + 4389025 = 5148^2 + 2095^2 .

It is a cyclic number.

It is not a de Polignac number, because 30890929 - 2¹⁵ = 30858161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30890891 and 30890900.

It is not a weakly prime, because it can be changed into another prime (30890129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15445464 + 15445465.

It is an arithmetic number, because the mean of its divisors is an integer number (15445465).

Almost surely, 2^30890929 is an apocalyptic number.

It is an amenable number.

30890929 is a deficient number, since it is larger than the sum of its proper divisors (1).

30890929 is an equidigital number, since it uses as much as digits as its factorization.

30890929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 30890929 is about 5557.9608670807. The cubic root of 30890929 is about 313.7692091539.

The spelling of 30890929 in words is "thirty million, eight hundred ninety thousand, nine hundred twenty-nine".