30331969 has 2 divisors, whose sum is σ = 30331970. Its totient is φ = 30331968.

The previous prime is 30331957. The next prime is 30331993. The reversal of 30331969 is 96913303.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15800625 + 14531344 = 3975^2 + 3812^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30331969 is a prime.

It is a super-2 number, since 2×30331969² = 1840056686833922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30331909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15165984 + 15165985.

It is an arithmetic number, because the mean of its divisors is an integer number (15165985).

Almost surely, 2^30331969 is an apocalyptic number.

It is an amenable number.

30331969 is a deficient number, since it is larger than the sum of its proper divisors (1).

30331969 is an equidigital number, since it uses as much as digits as its factorization.

30331969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13122, while the sum is 34.

The square root of 30331969 is about 5507.4466860788. The cubic root of 30331969 is about 311.8651654121.

The spelling of 30331969 in words is "thirty million, three hundred thirty-one thousand, nine hundred sixty-nine".