29728513 has 2 divisors, whose sum is σ = 29728514. Its totient is φ = 29728512.

The previous prime is 29728477. The next prime is 29728519. The reversal of 29728513 is 31582792.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21594609 + 8133904 = 4647^2 + 2852^2 .

It is a cyclic number.

It is not a de Polignac number, because 29728513 - 2¹⁷ = 29597441 is a prime.

It is not a weakly prime, because it can be changed into another prime (29728519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14864256 + 14864257.

It is an arithmetic number, because the mean of its divisors is an integer number (14864257).

Almost surely, 2^29728513 is an apocalyptic number.

It is an amenable number.

29728513 is a deficient number, since it is larger than the sum of its proper divisors (1).

29728513 is an equidigital number, since it uses as much as digits as its factorization.

29728513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 37.

The square root of 29728513 is about 5452.3859914720. The cubic root of 29728513 is about 309.7831053067.

The spelling of 29728513 in words is "twenty-nine million, seven hundred twenty-eight thousand, five hundred thirteen".