633478891469 has 2 divisors, whose sum is σ = 633478891470. Its totient is φ = 633478891468.

The previous prime is 633478891411. The next prime is 633478891471. The reversal of 633478891469 is 964198874336.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 530585498569 + 102893392900 = 728413^2 + 320770^2 .

It is a cyclic number.

It is not a de Polignac number, because 633478891469 - 2²⁸ = 633210456013 is a prime.

It is a super-2 number, since 2×633478891469² (a number of 24 digits) contains 22 as substring.

Together with 633478891471, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 633478891399 and 633478891408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (633478891169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316739445734 + 316739445735.

It is an arithmetic number, because the mean of its divisors is an integer number (316739445735).

Almost surely, 2^633478891469 is an apocalyptic number.

It is an amenable number.

633478891469 is a deficient number, since it is larger than the sum of its proper divisors (1).

633478891469 is an equidigital number, since it uses as much as digits as its factorization.

633478891469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188116992, while the sum is 68.

The spelling of 633478891469 in words is "six hundred thirty-three billion, four hundred seventy-eight million, eight hundred ninety-one thousand, four hundred sixty-nine".