29640427 has 2 divisors, whose sum is σ = 29640428. Its totient is φ = 29640426.

The previous prime is 29640419. The next prime is 29640439. The reversal of 29640427 is 72404692.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 29640427 - 2³ = 29640419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 29640392 and 29640401.

It is not a weakly prime, because it can be changed into another prime (29640467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14820213 + 14820214.

It is an arithmetic number, because the mean of its divisors is an integer number (14820214).

Almost surely, 2^29640427 is an apocalyptic number.

29640427 is a deficient number, since it is larger than the sum of its proper divisors (1).

29640427 is an equidigital number, since it uses as much as digits as its factorization.

29640427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 29640427 is about 5444.3022509776. The cubic root of 29640427 is about 309.4768387246.

The spelling of 29640427 in words is "twenty-nine million, six hundred forty thousand, four hundred twenty-seven".