29928397 has 2 divisors, whose sum is σ = 29928398. Its totient is φ = 29928396.

The previous prime is 29928383. The next prime is 29928407. The reversal of 29928397 is 79382992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15594601 + 14333796 = 3949^2 + 3786^2 .

It is a cyclic number.

It is not a de Polignac number, because 29928397 - 2¹⁵ = 29895629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 29928397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29928307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14964198 + 14964199.

It is an arithmetic number, because the mean of its divisors is an integer number (14964199).

Almost surely, 2^29928397 is an apocalyptic number.

It is an amenable number.

29928397 is a deficient number, since it is larger than the sum of its proper divisors (1).

29928397 is an equidigital number, since it uses as much as digits as its factorization.

29928397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 49.

The square root of 29928397 is about 5470.6852404429. The cubic root of 29928397 is about 310.4758456926.

The spelling of 29928397 in words is "twenty-nine million, nine hundred twenty-eight thousand, three hundred ninety-seven".