9725951 has 2 divisors, whose sum is σ = 9725952. Its totient is φ = 9725950.

The previous prime is 9725939. The next prime is 9725953. The reversal of 9725951 is 1595279.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9725951 - 2¹⁰ = 9724927 is a prime.

It is a Sophie Germain prime.

Together with 9725953, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9725953) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4862975 + 4862976.

It is an arithmetic number, because the mean of its divisors is an integer number (4862976).

Almost surely, 2^9725951 is an apocalyptic number.

9725951 is a deficient number, since it is larger than the sum of its proper divisors (1).

9725951 is an equidigital number, since it uses as much as digits as its factorization.

9725951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28350, while the sum is 38.

The square root of 9725951 is about 3118.6456996587. The cubic root of 9725951 is about 213.4571430302.

The spelling of 9725951 in words is "nine million, seven hundred twenty-five thousand, nine hundred fifty-one".