29899251397 has 2 divisors, whose sum is σ = 29899251398. Its totient is φ = 29899251396.

The previous prime is 29899251391. The next prime is 29899251427. The reversal of 29899251397 is 79315299892.

It is a Cunningham number, because it is equal to 172914²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29899251396 + 1 = 172914^2 + 1^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29899251397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29899251391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14949625698 + 14949625699.

It is an arithmetic number, because the mean of its divisors is an integer number (14949625699).

Almost surely, 2^29899251397 is an apocalyptic number.

It is an amenable number.

29899251397 is a deficient number, since it is larger than the sum of its proper divisors (1).

29899251397 is an equidigital number, since it uses as much as digits as its factorization.

29899251397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22044960, while the sum is 64.

The spelling of 29899251397 in words is "twenty-nine billion, eight hundred ninety-nine million, two hundred fifty-one thousand, three hundred ninety-seven".