25658947 has 2 divisors, whose sum is σ = 25658948. Its totient is φ = 25658946.

The previous prime is 25658929. The next prime is 25658957. The reversal of 25658947 is 74985652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25658947 - 2¹¹ = 25656899 is a prime.

It is a super-2 number, since 2×25658947² = 1316763122297618, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 25658897 and 25658906.

It is not a weakly prime, because it can be changed into another prime (25658957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12829473 + 12829474.

It is an arithmetic number, because the mean of its divisors is an integer number (12829474).

Almost surely, 2^25658947 is an apocalyptic number.

25658947 is a deficient number, since it is larger than the sum of its proper divisors (1).

25658947 is an equidigital number, since it uses as much as digits as its factorization.

25658947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 46.

The square root of 25658947 is about 5065.4661187298. The cubic root of 25658947 is about 294.9485575338.

The spelling of 25658947 in words is "twenty-five million, six hundred fifty-eight thousand, nine hundred forty-seven".