28631093 has 2 divisors, whose sum is σ = 28631094. Its totient is φ = 28631092.

The previous prime is 28631069. The next prime is 28631117. The reversal of 28631093 is 39013682.

It is a balanced prime because it is at equal distance from previous prime (28631069) and next prime (28631117).

It can be written as a sum of positive squares in only one way, i.e., 18852964 + 9778129 = 4342^2 + 3127^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28631093 is a prime.

It is equal to p_1778261 and since 28631093 and 1778261 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28631003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14315546 + 14315547.

It is an arithmetic number, because the mean of its divisors is an integer number (14315547).

Almost surely, 2^28631093 is an apocalyptic number.

It is an amenable number.

28631093 is a deficient number, since it is larger than the sum of its proper divisors (1).

28631093 is an equidigital number, since it uses as much as digits as its factorization.

28631093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 28631093 is about 5350.8030238460. The cubic root of 28631093 is about 305.9233614158.

The spelling of 28631093 in words is "twenty-eight million, six hundred thirty-one thousand, ninety-three".