29899251391 has 2 divisors, whose sum is σ = 29899251392. Its totient is φ = 29899251390.

The previous prime is 29899251383. The next prime is 29899251397. The reversal of 29899251391 is 19315299892.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 29899251391 - 2³ = 29899251383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29899251397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14949625695 + 14949625696.

It is an arithmetic number, because the mean of its divisors is an integer number (14949625696).

Almost surely, 2^29899251391 is an apocalyptic number.

29899251391 is a deficient number, since it is larger than the sum of its proper divisors (1).

29899251391 is an equidigital number, since it uses as much as digits as its factorization.

29899251391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3149280, while the sum is 58.

The spelling of 29899251391 in words is "twenty-nine billion, eight hundred ninety-nine million, two hundred fifty-one thousand, three hundred ninety-one".