28697093 has 2 divisors, whose sum is σ = 28697094. Its totient is φ = 28697092.

The previous prime is 28697083. The next prime is 28697107. The reversal of 28697093 is 39079682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26030404 + 2666689 = 5102^2 + 1633^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28697093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28697033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14348546 + 14348547.

It is an arithmetic number, because the mean of its divisors is an integer number (14348547).

Almost surely, 2^28697093 is an apocalyptic number.

It is an amenable number.

28697093 is a deficient number, since it is larger than the sum of its proper divisors (1).

28697093 is an equidigital number, since it uses as much as digits as its factorization.

28697093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 28697093 is about 5356.9667723442. The cubic root of 28697093 is about 306.1582511220.

It can be divided in two parts, 286 and 97093, that added together give a palindrome (97379).

The spelling of 28697093 in words is "twenty-eight million, six hundred ninety-seven thousand, ninety-three".