425937781 has 2 divisors, whose sum is σ = 425937782. Its totient is φ = 425937780.

The previous prime is 425937773. The next prime is 425937847. The reversal of 425937781 is 187739524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 266799556 + 159138225 = 16334^2 + 12615^2 .

It is a cyclic number.

It is not a de Polignac number, because 425937781 - 2³ = 425937773 is a prime.

It is a super-2 number, since 2×425937781² = 362845986566407922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425937731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212968890 + 212968891.

It is an arithmetic number, because the mean of its divisors is an integer number (212968891).

Almost surely, 2^425937781 is an apocalyptic number.

It is an amenable number.

425937781 is a deficient number, since it is larger than the sum of its proper divisors (1).

425937781 is an equidigital number, since it uses as much as digits as its factorization.

425937781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 46.

The square root of 425937781 is about 20638.2601253110. The cubic root of 425937781 is about 752.3998864617.

The spelling of 425937781 in words is "four hundred twenty-five million, nine hundred thirty-seven thousand, seven hundred eighty-one".