28429901 has 2 divisors, whose sum is σ = 28429902. Its totient is φ = 28429900.

The previous prime is 28429879. The next prime is 28429903. The reversal of 28429901 is 10992482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16801801 + 11628100 = 4099^2 + 3410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28429901 is a prime.

Together with 28429903, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28429903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14214950 + 14214951.

It is an arithmetic number, because the mean of its divisors is an integer number (14214951).

Almost surely, 2^28429901 is an apocalyptic number.

It is an amenable number.

28429901 is a deficient number, since it is larger than the sum of its proper divisors (1).

28429901 is an equidigital number, since it uses as much as digits as its factorization.

28429901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 28429901 is about 5331.9697110918. The cubic root of 28429901 is about 305.2050972033.

The spelling of 28429901 in words is "twenty-eight million, four hundred twenty-nine thousand, nine hundred one".