29997974079797 has 4 divisors (see below), whose sum is σ = 30040284340140. Its totient is φ = 29955663819456.

The previous prime is 29997974079739. The next prime is 29997974079839. The reversal of 29997974079797 is 79797047979992.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9597566824036 + 20400407255761 = 3097994^2 + 4516681^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29997974079797 is a prime.

It is a super-2 number, since 2×29997974079797² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29997914079797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21155129108 + ... + 21155130525.

It is an arithmetic number, because the mean of its divisors is an integer number (7510071085035).

Almost surely, 2^{29997974079797} is an apocalyptic number.

It is an amenable number.

29997974079797 is a deficient number, since it is larger than the sum of its proper divisors (42310260343).

29997974079797 is an equidigital number, since it uses as much as digits as its factorization.

29997974079797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42310260342.

The product of its (nonzero) digits is 71455431096, while the sum is 95.

The spelling of 29997974079797 in words is "twenty-nine trillion, nine hundred ninety-seven billion, nine hundred seventy-four million, seventy-nine thousand, seven hundred ninety-seven".