28172063 has 2 divisors, whose sum is σ = 28172064. Its totient is φ = 28172062.

The previous prime is 28172051. The next prime is 28172069. The reversal of 28172063 is 36027182.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28172063 - 2⁶ = 28171999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28172069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14086031 + 14086032.

It is an arithmetic number, because the mean of its divisors is an integer number (14086032).

Almost surely, 2^28172063 is an apocalyptic number.

28172063 is a deficient number, since it is larger than the sum of its proper divisors (1).

28172063 is an equidigital number, since it uses as much as digits as its factorization.

28172063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 28172063 is about 5307.7361464187. The cubic root of 28172063 is about 304.2796329088.

The spelling of 28172063 in words is "twenty-eight million, one hundred seventy-two thousand, sixty-three".