25701947 has 2 divisors, whose sum is σ = 25701948. Its totient is φ = 25701946.

The previous prime is 25701941. The next prime is 25701961. The reversal of 25701947 is 74910752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25701947 - 2⁴ = 25701931 is a prime.

It is not a weakly prime, because it can be changed into another prime (25701941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12850973 + 12850974.

It is an arithmetic number, because the mean of its divisors is an integer number (12850974).

Almost surely, 2^25701947 is an apocalyptic number.

25701947 is a deficient number, since it is larger than the sum of its proper divisors (1).

25701947 is an equidigital number, since it uses as much as digits as its factorization.

25701947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 25701947 is about 5069.7087687559. The cubic root of 25701947 is about 295.1132266690.

The spelling of 25701947 in words is "twenty-five million, seven hundred one thousand, nine hundred forty-seven".