635234381 has 2 divisors, whose sum is σ = 635234382. Its totient is φ = 635234380.

The previous prime is 635234371. The next prime is 635234387. The reversal of 635234381 is 183432536.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 334524100 + 300710281 = 18290^2 + 17341^2 .

It is a cyclic number.

It is not a de Polignac number, because 635234381 - 2¹⁴ = 635217997 is a prime.

It is a super-2 number, since 2×635234381² = 807045437608906322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (635234387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317617190 + 317617191.

It is an arithmetic number, because the mean of its divisors is an integer number (317617191).

Almost surely, 2^635234381 is an apocalyptic number.

It is an amenable number.

635234381 is a deficient number, since it is larger than the sum of its proper divisors (1).

635234381 is an equidigital number, since it uses as much as digits as its factorization.

635234381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 35.

The square root of 635234381 is about 25203.8564707864. The cubic root of 635234381 is about 859.6295416320.

The spelling of 635234381 in words is "six hundred thirty-five million, two hundred thirty-four thousand, three hundred eighty-one".