25901977 has 2 divisors, whose sum is σ = 25901978. Its totient is φ = 25901976.

The previous prime is 25901971. The next prime is 25901983. The reversal of 25901977 is 77910952.

It is a balanced prime because it is at equal distance from previous prime (25901971) and next prime (25901983).

It can be written as a sum of positive squares in only one way, i.e., 25512601 + 389376 = 5051^2 + 624^2 .

It is a cyclic number.

It is not a de Polignac number, because 25901977 - 2⁷ = 25901849 is a prime.

It is not a weakly prime, because it can be changed into another prime (25901971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12950988 + 12950989.

It is an arithmetic number, because the mean of its divisors is an integer number (12950989).

Almost surely, 2^25901977 is an apocalyptic number.

It is an amenable number.

25901977 is a deficient number, since it is larger than the sum of its proper divisors (1).

25901977 is an equidigital number, since it uses as much as digits as its factorization.

25901977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39690, while the sum is 40.

The square root of 25901977 is about 5089.3984909810. The cubic root of 25901977 is about 295.8768395889.

The spelling of 25901977 in words is "twenty-five million, nine hundred one thousand, nine hundred seventy-seven".