25728673 has 2 divisors, whose sum is σ = 25728674. Its totient is φ = 25728672.

The previous prime is 25728617. The next prime is 25728683. The reversal of 25728673 is 37682752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20493729 + 5234944 = 4527^2 + 2288^2 .

It is a cyclic number.

It is not a de Polignac number, because 25728673 - 2¹⁷ = 25597601 is a prime.

It is a super-2 number, since 2×25728673² = 1323929228681858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25728683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12864336 + 12864337.

It is an arithmetic number, because the mean of its divisors is an integer number (12864337).

Almost surely, 2^25728673 is an apocalyptic number.

It is an amenable number.

25728673 is a deficient number, since it is larger than the sum of its proper divisors (1).

25728673 is an equidigital number, since it uses as much as digits as its factorization.

25728673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 40.

The square root of 25728673 is about 5072.3439354996. The cubic root of 25728673 is about 295.2154817479.

The spelling of 25728673 in words is "twenty-five million, seven hundred twenty-eight thousand, six hundred seventy-three".