25550977 has 2 divisors, whose sum is σ = 25550978. Its totient is φ = 25550976.

The previous prime is 25550963. The next prime is 25550981. The reversal of 25550977 is 77905552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23902321 + 1648656 = 4889^2 + 1284^2 .

It is a cyclic number.

It is not a de Polignac number, because 25550977 - 2⁷ = 25550849 is a prime.

It is equal to p_1598179 and since 25550977 and 1598179 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (25550927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12775488 + 12775489.

It is an arithmetic number, because the mean of its divisors is an integer number (12775489).

Almost surely, 2^25550977 is an apocalyptic number.

It is an amenable number.

25550977 is a deficient number, since it is larger than the sum of its proper divisors (1).

25550977 is an equidigital number, since it uses as much as digits as its factorization.

25550977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110250, while the sum is 40.

The square root of 25550977 is about 5054.7974242298. The cubic root of 25550977 is about 294.5342723068.

The spelling of 25550977 in words is "twenty-five million, five hundred fifty thousand, nine hundred seventy-seven".