29691901 has 2 divisors, whose sum is σ = 29691902. Its totient is φ = 29691900.

The previous prime is 29691899. The next prime is 29691931. The reversal of 29691901 is 10919692.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29268100 + 423801 = 5410^2 + 651^2 .

It is a cyclic number.

It is not a de Polignac number, because 29691901 - 2¹ = 29691899 is a prime.

Together with 29691899, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29691931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14845950 + 14845951.

It is an arithmetic number, because the mean of its divisors is an integer number (14845951).

Almost surely, 2^29691901 is an apocalyptic number.

It is an amenable number.

29691901 is a deficient number, since it is larger than the sum of its proper divisors (1).

29691901 is an equidigital number, since it uses as much as digits as its factorization.

29691901 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 37.

The square root of 29691901 is about 5449.0275279173. The cubic root of 29691901 is about 309.6558824594.

The spelling of 29691901 in words is "twenty-nine million, six hundred ninety-one thousand, nine hundred one".