29878993 has 2 divisors, whose sum is σ = 29878994. Its totient is φ = 29878992.

The previous prime is 29878987. The next prime is 29878997. The reversal of 29878993 is 39987892.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23155344 + 6723649 = 4812^2 + 2593^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29878993 is a prime.

It is not a weakly prime, because it can be changed into another prime (29878997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14939496 + 14939497.

It is an arithmetic number, because the mean of its divisors is an integer number (14939497).

Almost surely, 2^29878993 is an apocalyptic number.

It is an amenable number.

29878993 is a deficient number, since it is larger than the sum of its proper divisors (1).

29878993 is an equidigital number, since it uses as much as digits as its factorization.

29878993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 55.

The square root of 29878993 is about 5466.1680362023. The cubic root of 29878993 is about 310.3049133110.

The spelling of 29878993 in words is "twenty-nine million, eight hundred seventy-eight thousand, nine hundred ninety-three".