25687963 has 4 divisors (see below), whose sum is σ = 29357680. Its totient is φ = 22018248.

The previous prime is 25687957. The next prime is 25687967. The reversal of 25687963 is 36978652.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 25687963 - 2¹⁷ = 25556891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25687967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1834848 + ... + 1834861.

It is an arithmetic number, because the mean of its divisors is an integer number (7339420).

Almost surely, 2^25687963 is an apocalyptic number.

25687963 is a deficient number, since it is larger than the sum of its proper divisors (3669717).

25687963 is an equidigital number, since it uses as much as digits as its factorization.

25687963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3669716.

The product of its digits is 544320, while the sum is 46.

The square root of 25687963 is about 5068.3294091841. The cubic root of 25687963 is about 295.0596949003.

The spelling of 25687963 in words is "twenty-five million, six hundred eighty-seven thousand, nine hundred sixty-three".