29998681 has 2 divisors, whose sum is σ = 29998682. Its totient is φ = 29998680.

The previous prime is 29998667. The next prime is 29998687. The reversal of 29998681 is 18689992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25918281 + 4080400 = 5091^2 + 2020^2 .

It is a cyclic number.

It is not a de Polignac number, because 29998681 - 2¹¹ = 29996633 is a prime.

It is a super-2 number, since 2×29998681² = 1799841723479522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (29998687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14999340 + 14999341.

It is an arithmetic number, because the mean of its divisors is an integer number (14999341).

Almost surely, 2^29998681 is an apocalyptic number.

It is an amenable number.

29998681 is a deficient number, since it is larger than the sum of its proper divisors (1).

29998681 is an equidigital number, since it uses as much as digits as its factorization.

29998681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 52.

The square root of 29998681 is about 5477.1051660526. The cubic root of 29998681 is about 310.7186967068.

The spelling of 29998681 in words is "twenty-nine million, nine hundred ninety-eight thousand, six hundred eighty-one".