25477409 has 2 divisors, whose sum is σ = 25477410. Its totient is φ = 25477408.

The previous prime is 25477391. The next prime is 25477411. The reversal of 25477409 is 90477452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25150225 + 327184 = 5015^2 + 572^2 .

It is a cyclic number.

It is not a de Polignac number, because 25477409 - 2²⁴ = 8700193 is a prime.

Together with 25477411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25477429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12738704 + 12738705.

It is an arithmetic number, because the mean of its divisors is an integer number (12738705).

Almost surely, 2^25477409 is an apocalyptic number.

It is an amenable number.

25477409 is a deficient number, since it is larger than the sum of its proper divisors (1).

25477409 is an equidigital number, since it uses as much as digits as its factorization.

25477409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 25477409 is about 5047.5151312304. The cubic root of 25477409 is about 294.2513199573.

The spelling of 25477409 in words is "twenty-five million, four hundred seventy-seven thousand, four hundred nine".