25771973 has 2 divisors, whose sum is σ = 25771974. Its totient is φ = 25771972.

The previous prime is 25771957. The next prime is 25772009. The reversal of 25771973 is 37917752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22448644 + 3323329 = 4738^2 + 1823^2 .

It is a cyclic number.

It is not a de Polignac number, because 25771973 - 2⁴ = 25771957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25771973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25771073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12885986 + 12885987.

It is an arithmetic number, because the mean of its divisors is an integer number (12885987).

Almost surely, 2^25771973 is an apocalyptic number.

It is an amenable number.

25771973 is a deficient number, since it is larger than the sum of its proper divisors (1).

25771973 is an equidigital number, since it uses as much as digits as its factorization.

25771973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92610, while the sum is 41.

The square root of 25771973 is about 5076.6103848927. The cubic root of 25771973 is about 295.3809996264.

The spelling of 25771973 in words is "twenty-five million, seven hundred seventy-one thousand, nine hundred seventy-three".