25994977 has 6 divisors (see below), whose sum is σ = 26201058. Its totient is φ = 25789824.

The previous prime is 25994971. The next prime is 25994993. The reversal of 25994977 is 77949952.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19395216 + 6599761 = 4404^2 + 2569^2 .

It is not a de Polignac number, because 25994977 - 2¹¹ = 25992929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25994971) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70648 + ... + 71014.

It is an arithmetic number, because the mean of its divisors is an integer number (4366843).

Almost surely, 2^25994977 is an apocalyptic number.

It is an amenable number.

25994977 is a deficient number, since it is larger than the sum of its proper divisors (206081).

25994977 is an frugal number, since it uses more digits than its factorization.

25994977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927 (or 560 counting only the distinct ones).

The product of its digits is 1428840, while the sum is 52.

The square root of 25994977 is about 5098.5269441281. The cubic root of 25994977 is about 296.2305278970.

The spelling of 25994977 in words is "twenty-five million, nine hundred ninety-four thousand, nine hundred seventy-seven".