29399021 has 2 divisors, whose sum is σ = 29399022. Its totient is φ = 29399020.

The previous prime is 29398973. The next prime is 29399039. The reversal of 29399021 is 12099392.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29052100 + 346921 = 5390^2 + 589^2 .

It is a cyclic number.

It is not a de Polignac number, because 29399021 - 2²² = 25204717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29399921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14699510 + 14699511.

It is an arithmetic number, because the mean of its divisors is an integer number (14699511).

Almost surely, 2^29399021 is an apocalyptic number.

It is an amenable number.

29399021 is a deficient number, since it is larger than the sum of its proper divisors (1).

29399021 is an equidigital number, since it uses as much as digits as its factorization.

29399021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 29399021 is about 5422.0864065413. The cubic root of 29399021 is about 308.6343709683.

It can be divided in two parts, 293 and 99021, that multiplied together give a triangular number (29013153 = T₇₆₁₇).

The spelling of 29399021 in words is "twenty-nine million, three hundred ninety-nine thousand, twenty-one".