3994481629 has 2 divisors, whose sum is σ = 3994481630. Its totient is φ = 3994481628.

The previous prime is 3994481567. The next prime is 3994481639. The reversal of 3994481629 is 9261844993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3992976100 + 1505529 = 63190^2 + 1227^2 .

It is a cyclic number.

It is not a de Polignac number, because 3994481629 - 2⁷ = 3994481501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3994481629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3994481639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1997240814 + 1997240815.

It is an arithmetic number, because the mean of its divisors is an integer number (1997240815).

Almost surely, 2^3994481629 is an apocalyptic number.

It is an amenable number.

3994481629 is a deficient number, since it is larger than the sum of its proper divisors (1).

3994481629 is an equidigital number, since it uses as much as digits as its factorization.

3994481629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3359232, while the sum is 55.

The square root of 3994481629 is about 63201.9115929257. The cubic root of 3994481629 is about 1586.6707270206.

The spelling of 3994481629 in words is "three billion, nine hundred ninety-four million, four hundred eighty-one thousand, six hundred twenty-nine".