29969561 has 2 divisors, whose sum is σ = 29969562. Its totient is φ = 29969560.

The previous prime is 29969551. The next prime is 29969567. The reversal of 29969561 is 16596992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29539225 + 430336 = 5435^2 + 656^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29969561 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (29969567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14984780 + 14984781.

It is an arithmetic number, because the mean of its divisors is an integer number (14984781).

Almost surely, 2^29969561 is an apocalyptic number.

It is an amenable number.

29969561 is a deficient number, since it is larger than the sum of its proper divisors (1).

29969561 is an equidigital number, since it uses as much as digits as its factorization.

29969561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 262440, while the sum is 47.

The square root of 29969561 is about 5474.4461820352. The cubic root of 29969561 is about 310.6181249769.

The spelling of 29969561 in words is "twenty-nine million, nine hundred sixty-nine thousand, five hundred sixty-one".