3918893629 has 6 divisors (see below), whose sum is σ = 4558713054. Its totient is φ = 3359051640.

The previous prime is 3918893609. The next prime is 3918893639. The reversal of 3918893629 is 9263988193.

It can be written as a sum of positive squares in only one way, i.e., 3100819225 + 818074404 = 55685^2 + 28602^2 .

It is not a de Polignac number, because 3918893629 - 2⁵ = 3918893597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3918893609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39988662 + ... + 39988759.

It is an arithmetic number, because the mean of its divisors is an integer number (759785509).

Almost surely, 2^3918893629 is an apocalyptic number.

It is an amenable number.

3918893629 is a deficient number, since it is larger than the sum of its proper divisors (639819425).

3918893629 is an equidigital number, since it uses as much as digits as its factorization.

3918893629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79977435 (or 79977428 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 58.

The square root of 3918893629 is about 62601.0673151824. The cubic root of 3918893629 is about 1576.5986796164.

The spelling of 3918893629 in words is "three billion, nine hundred eighteen million, eight hundred ninety-three thousand, six hundred twenty-nine".