25977947 has 4 divisors (see below), whose sum is σ = 25988640. Its totient is φ = 25967256.

The previous prime is 25977937. The next prime is 25977949. The reversal of 25977947 is 74977952.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25977947 - 2¹² = 25973851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25977895 and 25977904.

It is not an unprimeable number, because it can be changed into a prime (25977949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254 + ... + 7212.

It is an arithmetic number, because the mean of its divisors is an integer number (6497160).

Almost surely, 2^25977947 is an apocalyptic number.

25977947 is a deficient number, since it is larger than the sum of its proper divisors (10693).

25977947 is an equidigital number, since it uses as much as digits as its factorization.

25977947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10692.

The product of its digits is 1111320, while the sum is 50.

The square root of 25977947 is about 5096.8565802855. The cubic root of 25977947 is about 296.1658242691.

The spelling of 25977947 in words is "twenty-five million, nine hundred seventy-seven thousand, nine hundred forty-seven".