25509629 has 2 divisors, whose sum is σ = 25509630. Its totient is φ = 25509628.

The previous prime is 25509619. The next prime is 25509641. The reversal of 25509629 is 92690552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25351225 + 158404 = 5035^2 + 398^2 .

It is a cyclic number.

It is not a de Polignac number, because 25509629 - 2²⁰ = 24461053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25509592 and 25509601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25509619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12754814 + 12754815.

It is an arithmetic number, because the mean of its divisors is an integer number (12754815).

Almost surely, 2^25509629 is an apocalyptic number.

It is an amenable number.

25509629 is a deficient number, since it is larger than the sum of its proper divisors (1).

25509629 is an equidigital number, since it uses as much as digits as its factorization.

25509629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 25509629 is about 5050.7057922631. The cubic root of 25509629 is about 294.3753093278.

The spelling of 25509629 in words is "twenty-five million, five hundred nine thousand, six hundred twenty-nine".