25275709 has 2 divisors, whose sum is σ = 25275710. Its totient is φ = 25275708.

The previous prime is 25275703. The next prime is 25275713. The reversal of 25275709 is 90757252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25220484 + 55225 = 5022^2 + 235^2 .

It is a cyclic number.

It is not a de Polignac number, because 25275709 - 2²¹ = 23178557 is a prime.

It is a super-2 number, since 2×25275709² = 1277722930905362, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25275703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12637854 + 12637855.

It is an arithmetic number, because the mean of its divisors is an integer number (12637855).

Almost surely, 2^25275709 is an apocalyptic number.

It is an amenable number.

25275709 is a deficient number, since it is larger than the sum of its proper divisors (1).

25275709 is an equidigital number, since it uses as much as digits as its factorization.

25275709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 44100, while the sum is 37.

The square root of 25275709 is about 5027.4953008432. The cubic root of 25275709 is about 293.4727503875.

The spelling of 25275709 in words is "twenty-five million, two hundred seventy-five thousand, seven hundred nine".