629491481 has 2 divisors, whose sum is σ = 629491482. Its totient is φ = 629491480.

The previous prime is 629491463. The next prime is 629491501. The reversal of 629491481 is 184194926.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 629257225 + 234256 = 25085^2 + 484^2 .

It is a cyclic number.

It is not a de Polignac number, because 629491481 - 2⁶ = 629491417 is a prime.

It is a super-2 number, since 2×629491481² = 792519049303146722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (629491411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314745740 + 314745741.

It is an arithmetic number, because the mean of its divisors is an integer number (314745741).

Almost surely, 2^629491481 is an apocalyptic number.

It is an amenable number.

629491481 is a deficient number, since it is larger than the sum of its proper divisors (1).

629491481 is an equidigital number, since it uses as much as digits as its factorization.

629491481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 44.

The square root of 629491481 is about 25089.6688100899. The cubic root of 629491481 is about 857.0311732567.

The spelling of 629491481 in words is "six hundred twenty-nine million, four hundred ninety-one thousand, four hundred eighty-one".