29991984097 has 2 divisors, whose sum is σ = 29991984098. Its totient is φ = 29991984096.

The previous prime is 29991984083. The next prime is 29991984109. The reversal of 29991984097 is 79048919992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28291576401 + 1700407696 = 168201^2 + 41236^2 .

It is a cyclic number.

It is not a de Polignac number, because 29991984097 - 2¹⁹ = 29991459809 is a prime.

It is a super-2 number, since 2×29991984097² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (29991984397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14995992048 + 14995992049.

It is an arithmetic number, because the mean of its divisors is an integer number (14995992049).

Almost surely, 2^29991984097 is an apocalyptic number.

It is an amenable number.

29991984097 is a deficient number, since it is larger than the sum of its proper divisors (1).

29991984097 is an equidigital number, since it uses as much as digits as its factorization.

29991984097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26453952, while the sum is 67.

The spelling of 29991984097 in words is "twenty-nine billion, nine hundred ninety-one million, nine hundred eighty-four thousand, ninety-seven".