29680421 has 2 divisors, whose sum is σ = 29680422. Its totient is φ = 29680420.

The previous prime is 29680411. The next prime is 29680429. The reversal of 29680421 is 12408692.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26112100 + 3568321 = 5110^2 + 1889^2 .

It is a cyclic number.

It is not a de Polignac number, because 29680421 - 2²² = 25486117 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 (29680429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14840210 + 14840211.

It is an arithmetic number, because the mean of its divisors is an integer number (14840211).

Almost surely, 2^29680421 is an apocalyptic number.

It is an amenable number.

29680421 is a deficient number, since it is larger than the sum of its proper divisors (1).

29680421 is an equidigital number, since it uses as much as digits as its factorization.

29680421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 29680421 is about 5447.9740271040. The cubic root of 29680421 is about 309.6159691311.

The spelling of 29680421 in words is "twenty-nine million, six hundred eighty thousand, four hundred twenty-one".