29921057 has 2 divisors, whose sum is σ = 29921058. Its totient is φ = 29921056.

The previous prime is 29921053. The next prime is 29921063. The reversal of 29921057 is 75012992.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28686736 + 1234321 = 5356^2 + 1111^2 .

It is a cyclic number.

It is not a de Polignac number, because 29921057 - 2² = 29921053 is a prime.

It is a super-3 number, since 3×29921057³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (29921053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14960528 + 14960529.

It is an arithmetic number, because the mean of its divisors is an integer number (14960529).

Almost surely, 2^29921057 is an apocalyptic number.

It is an amenable number.

29921057 is a deficient number, since it is larger than the sum of its proper divisors (1).

29921057 is an equidigital number, since it uses as much as digits as its factorization.

29921057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 29921057 is about 5470.0143509867. The cubic root of 29921057 is about 310.4504620073.

The spelling of 29921057 in words is "twenty-nine million, nine hundred twenty-one thousand, fifty-seven".