426752981 has 2 divisors, whose sum is σ = 426752982. Its totient is φ = 426752980.

The previous prime is 426752957. The next prime is 426752987. The reversal of 426752981 is 189257624.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 328841956 + 97911025 = 18134^2 + 9895^2 .

It is a cyclic number.

It is not a de Polignac number, because 426752981 - 2⁶ = 426752917 is a prime.

It is a super-2 number, since 2×426752981² = 364236213584772722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426752987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213376490 + 213376491.

It is an arithmetic number, because the mean of its divisors is an integer number (213376491).

Almost surely, 2^426752981 is an apocalyptic number.

It is an amenable number.

426752981 is a deficient number, since it is larger than the sum of its proper divisors (1).

426752981 is an equidigital number, since it uses as much as digits as its factorization.

426752981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 44.

The square root of 426752981 is about 20658.0004114629. Note that the first 3 decimals coincide. The cubic root of 426752981 is about 752.8795852429.

The spelling of 426752981 in words is "four hundred twenty-six million, seven hundred fifty-two thousand, nine hundred eighty-one".