28319701 has 2 divisors, whose sum is σ = 28319702. Its totient is φ = 28319700.

The previous prime is 28319663. The next prime is 28319719. The reversal of 28319701 is 10791382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17230801 + 11088900 = 4151^2 + 3330^2 .

It is a cyclic number.

It is not a de Polignac number, because 28319701 - 2¹⁵ = 28286933 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 (28317701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14159850 + 14159851.

It is an arithmetic number, because the mean of its divisors is an integer number (14159851).

Almost surely, 2^28319701 is an apocalyptic number.

It is an amenable number.

28319701 is a deficient number, since it is larger than the sum of its proper divisors (1).

28319701 is an equidigital number, since it uses as much as digits as its factorization.

28319701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 28319701 is about 5321.6257854156. The cubic root of 28319701 is about 304.8102411866.

The spelling of 28319701 in words is "twenty-eight million, three hundred nineteen thousand, seven hundred one".