25457977 has 2 divisors, whose sum is σ = 25457978. Its totient is φ = 25457976.

The previous prime is 25457963. The next prime is 25457983. The reversal of 25457977 is 77975452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24245776 + 1212201 = 4924^2 + 1101^2 .

It is a cyclic number.

It is not a de Polignac number, because 25457977 - 2¹⁵ = 25425209 is a prime.

It is not a weakly prime, because it can be changed into another prime (25457077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12728988 + 12728989.

It is an arithmetic number, because the mean of its divisors is an integer number (12728989).

Almost surely, 2^25457977 is an apocalyptic number.

It is an amenable number.

25457977 is a deficient number, since it is larger than the sum of its proper divisors (1).

25457977 is an equidigital number, since it uses as much as digits as its factorization.

25457977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 617400, while the sum is 46.

The square root of 25457977 is about 5045.5898564984. The cubic root of 25457977 is about 294.1764909722.

The spelling of 25457977 in words is "twenty-five million, four hundred fifty-seven thousand, nine hundred seventy-seven".