30862961 has 2 divisors, whose sum is σ = 30862962. Its totient is φ = 30862960.

The previous prime is 30862943. The next prime is 30862963. The reversal of 30862961 is 16926803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22848400 + 8014561 = 4780^2 + 2831^2 .

It is an emirp because it is prime and its reverse (16926803) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30862961 - 2¹⁰ = 30861937 is a prime.

Together with 30862963, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30862963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15431480 + 15431481.

It is an arithmetic number, because the mean of its divisors is an integer number (15431481).

Almost surely, 2^30862961 is an apocalyptic number.

It is an amenable number.

30862961 is a deficient number, since it is larger than the sum of its proper divisors (1).

30862961 is an equidigital number, since it uses as much as digits as its factorization.

30862961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 30862961 is about 5555.4442666631. Note that the first 3 decimals coincide. The cubic root of 30862961 is about 313.6744872054.

The spelling of 30862961 in words is "thirty million, eight hundred sixty-two thousand, nine hundred sixty-one".