29991679673 has 2 divisors, whose sum is σ = 29991679674. Its totient is φ = 29991679672.

The previous prime is 29991679661. The next prime is 29991679681. The reversal of 29991679673 is 37697619992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24469406329 + 5522273344 = 156427^2 + 74312^2 .

It is a cyclic number.

It is not a de Polignac number, because 29991679673 - 2³⁰ = 28917937849 is a prime.

It is not a weakly prime, because it can be changed into another prime (29991679573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14995839836 + 14995839837.

It is an arithmetic number, because the mean of its divisors is an integer number (14995839837).

Almost surely, 2^29991679673 is an apocalyptic number.

It is an amenable number.

29991679673 is a deficient number, since it is larger than the sum of its proper divisors (1).

29991679673 is an equidigital number, since it uses as much as digits as its factorization.

29991679673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69441624, while the sum is 68.

The spelling of 29991679673 in words is "twenty-nine billion, nine hundred ninety-one million, six hundred seventy-nine thousand, six hundred seventy-three".