256433629 has 2 divisors, whose sum is σ = 256433630. Its totient is φ = 256433628.

The previous prime is 256433621. The next prime is 256433657. The reversal of 256433629 is 926334652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204204100 + 52229529 = 14290^2 + 7227^2 .

It is a cyclic number.

It is not a de Polignac number, because 256433629 - 2³ = 256433621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256433591 and 256433600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256433621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128216814 + 128216815.

It is an arithmetic number, because the mean of its divisors is an integer number (128216815).

Almost surely, 2^256433629 is an apocalyptic number.

It is an amenable number.

256433629 is a deficient number, since it is larger than the sum of its proper divisors (1).

256433629 is an equidigital number, since it uses as much as digits as its factorization.

256433629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 40.

The square root of 256433629 is about 16013.5451727592. The cubic root of 256433629 is about 635.3187306014.

The spelling of 256433629 in words is "two hundred fifty-six million, four hundred thirty-three thousand, six hundred twenty-nine".