25683979 has 2 divisors, whose sum is σ = 25683980. Its totient is φ = 25683978.

The previous prime is 25683967. The next prime is 25684019. The reversal of 25683979 is 97938652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25683979 - 2¹³ = 25675787 is a prime.

It is not a weakly prime, because it can be changed into another prime (25683919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12841989 + 12841990.

It is an arithmetic number, because the mean of its divisors is an integer number (12841990).

Almost surely, 2^25683979 is an apocalyptic number.

25683979 is a deficient number, since it is larger than the sum of its proper divisors (1).

25683979 is an equidigital number, since it uses as much as digits as its factorization.

25683979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 49.

The square root of 25683979 is about 5067.9363650306. The cubic root of 25683979 is about 295.0444403029.

It can be divided in two parts, 25683 and 979, that added together give a palindrome (26662).

The spelling of 25683979 in words is "twenty-five million, six hundred eighty-three thousand, nine hundred seventy-nine".