29617421 has 2 divisors, whose sum is σ = 29617422. Its totient is φ = 29617420.

The previous prime is 29617403. The next prime is 29617429. The reversal of 29617421 is 12471692.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21855625 + 7761796 = 4675^2 + 2786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29617421 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29617429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14808710 + 14808711.

It is an arithmetic number, because the mean of its divisors is an integer number (14808711).

Almost surely, 2^29617421 is an apocalyptic number.

It is an amenable number.

29617421 is a deficient number, since it is larger than the sum of its proper divisors (1).

29617421 is an equidigital number, since it uses as much as digits as its factorization.

29617421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 29617421 is about 5442.1889897357. The cubic root of 29617421 is about 309.3967491563.

The spelling of 29617421 in words is "twenty-nine million, six hundred seventeen thousand, four hundred twenty-one".