29997974071691 has 8 divisors (see below), whose sum is σ = 30409011791424. Its totient is φ = 29586939232320.

The previous prime is 29997974071679. The next prime is 29997974071739. The reversal of 29997974071691 is 19617047979992.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 29997974071691 - 2¹⁸ = 29997973809547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29997974071601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28100105 + ... + 29148101.

It is an arithmetic number, because the mean of its divisors is an integer number (3801126473928).

Almost surely, 2^{29997974071691} is an apocalyptic number.

29997974071691 is a deficient number, since it is larger than the sum of its proper divisors (411037719733).

29997974071691 is a wasteful number, since it uses less digits than its factorization.

29997974071691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440181.

The product of its (nonzero) digits is 972182736, while the sum is 80.

The spelling of 29997974071691 in words is "twenty-nine trillion, nine hundred ninety-seven billion, nine hundred seventy-four million, seventy-one thousand, six hundred ninety-one".