425722981 has 2 divisors, whose sum is σ = 425722982. Its totient is φ = 425722980.

The previous prime is 425722961. The next prime is 425722991. The reversal of 425722981 is 189227524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 263542756 + 162180225 = 16234^2 + 12735^2 .

It is a cyclic number.

It is not a de Polignac number, because 425722981 - 2⁹ = 425722469 is a prime.

It is a super-2 number, since 2×425722981² = 362480113103052722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425722901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212861490 + 212861491.

It is an arithmetic number, because the mean of its divisors is an integer number (212861491).

Almost surely, 2^425722981 is an apocalyptic number.

It is an amenable number.

425722981 is a deficient number, since it is larger than the sum of its proper divisors (1).

425722981 is an equidigital number, since it uses as much as digits as its factorization.

425722981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 40.

The square root of 425722981 is about 20633.0555420180. The cubic root of 425722981 is about 752.2733870230.

The spelling of 425722981 in words is "four hundred twenty-five million, seven hundred twenty-two thousand, nine hundred eighty-one".