425644357 has 2 divisors, whose sum is σ = 425644358. Its totient is φ = 425644356.

The previous prime is 425644343. The next prime is 425644363. The reversal of 425644357 is 753446524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 399440196 + 26204161 = 19986^2 + 5119^2 .

It is a cyclic number.

It is not a de Polignac number, because 425644357 - 2²³ = 417255749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425644957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212822178 + 212822179.

It is an arithmetic number, because the mean of its divisors is an integer number (212822179).

Almost surely, 2^425644357 is an apocalyptic number.

It is an amenable number.

425644357 is a deficient number, since it is larger than the sum of its proper divisors (1).

425644357 is an equidigital number, since it uses as much as digits as its factorization.

425644357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 40.

The square root of 425644357 is about 20631.1501618305. The cubic root of 425644357 is about 752.2270733503.

The spelling of 425644357 in words is "four hundred twenty-five million, six hundred forty-four thousand, three hundred fifty-seven".