25530977 has 2 divisors, whose sum is σ = 25530978. Its totient is φ = 25530976.

The previous prime is 25530941. The next prime is 25530997. The reversal of 25530977 is 77903552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25090081 + 440896 = 5009^2 + 664^2 .

It is a cyclic number.

It is not a de Polignac number, because 25530977 - 2⁶ = 25530913 is a prime.

It is a Chen prime.

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 25530977.

It is not a weakly prime, because it can be changed into another prime (25530997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12765488 + 12765489.

It is an arithmetic number, because the mean of its divisors is an integer number (12765489).

Almost surely, 2^25530977 is an apocalyptic number.

It is an amenable number.

25530977 is a deficient number, since it is larger than the sum of its proper divisors (1).

25530977 is an equidigital number, since it uses as much as digits as its factorization.

25530977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 66150, while the sum is 38.

The square root of 25530977 is about 5052.8187182997. The cubic root of 25530977 is about 294.4574034511.

The spelling of 25530977 in words is "twenty-five million, five hundred thirty thousand, nine hundred seventy-seven".