7725498257 has 2 divisors, whose sum is σ = 7725498258. Its totient is φ = 7725498256.

The previous prime is 7725498247. The next prime is 7725498259. The reversal of 7725498257 is 7528945277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7409938561 + 315559696 = 86081^2 + 17764^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7725498257 is a prime.

Together with 7725498259, 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 (7725498259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3862749128 + 3862749129.

It is an arithmetic number, because the mean of its divisors is an integer number (3862749129).

Almost surely, 2^7725498257 is an apocalyptic number.

It is an amenable number.

7725498257 is a deficient number, since it is larger than the sum of its proper divisors (1).

7725498257 is an equidigital number, since it uses as much as digits as its factorization.

7725498257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9878400, while the sum is 56.

The square root of 7725498257 is about 87894.8135955700. The cubic root of 7725498257 is about 1976.8581141057.

The spelling of 7725498257 in words is "seven billion, seven hundred twenty-five million, four hundred ninety-eight thousand, two hundred fifty-seven".