29997923269081 has 2 divisors, whose sum is σ = 29997923269082. Its totient is φ = 29997923269080.

The previous prime is 29997923269049. The next prime is 29997923269109. The reversal of 29997923269081 is 18096232979992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24598713364681 + 5399209904400 = 4959709^2 + 2323620^2 .

It is a cyclic number.

It is not a de Polignac number, because 29997923269081 - 2⁵ = 29997923269049 is a prime.

It is a super-2 number, since 2×29997923269081² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 29997923268989 and 29997923269007.

It is not a weakly prime, because it can be changed into another prime (29997923269681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14998961634540 + 14998961634541.

It is an arithmetic number, because the mean of its divisors is an integer number (14998961634541).

Almost surely, 2^{29997923269081} is an apocalyptic number.

It is an amenable number.

29997923269081 is a deficient number, since it is larger than the sum of its proper divisors (1).

29997923269081 is an equidigital number, since it uses as much as digits as its factorization.

29997923269081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 476171136, while the sum is 76.

The spelling of 29997923269081 in words is "twenty-nine trillion, nine hundred ninety-seven billion, nine hundred twenty-three million, two hundred sixty-nine thousand, eighty-one".