29979889 has 2 divisors, whose sum is σ = 29979890. Its totient is φ = 29979888.

The previous prime is 29979839. The next prime is 29979893. The reversal of 29979889 is 98897992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29517489 + 462400 = 5433^2 + 680^2 .

It is a cyclic number.

It is not a de Polignac number, because 29979889 - 2⁹ = 29979377 is a prime.

It is not a weakly prime, because it can be changed into another prime (29979809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14989944 + 14989945.

It is an arithmetic number, because the mean of its divisors is an integer number (14989945).

Almost surely, 2^29979889 is an apocalyptic number.

It is an amenable number.

29979889 is a deficient number, since it is larger than the sum of its proper divisors (1).

29979889 is an equidigital number, since it uses as much as digits as its factorization.

29979889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 61.

The square root of 29979889 is about 5475.3893925455. The cubic root of 29979889 is about 310.6538022379.

The spelling of 29979889 in words is "twenty-nine million, nine hundred seventy-nine thousand, eight hundred eighty-nine".