25672649 has 2 divisors, whose sum is σ = 25672650. Its totient is φ = 25672648.

The previous prime is 25672613. The next prime is 25672657. The reversal of 25672649 is 94627652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19758025 + 5914624 = 4445^2 + 2432^2 .

It is a cyclic number.

It is not a de Polignac number, because 25672649 - 2¹² = 25668553 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25672609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12836324 + 12836325.

It is an arithmetic number, because the mean of its divisors is an integer number (12836325).

Almost surely, 2^25672649 is an apocalyptic number.

It is an amenable number.

25672649 is a deficient number, since it is larger than the sum of its proper divisors (1).

25672649 is an equidigital number, since it uses as much as digits as its factorization.

25672649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 41.

The square root of 25672649 is about 5066.8184297446. The cubic root of 25672649 is about 295.0010495031.

The spelling of 25672649 in words is "twenty-five million, six hundred seventy-two thousand, six hundred forty-nine".