3918021929 has 2 divisors, whose sum is σ = 3918021930. Its totient is φ = 3918021928.

The previous prime is 3918021923. The next prime is 3918021937. The reversal of 3918021929 is 9291208193.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3791234329 + 126787600 = 61573^2 + 11260^2 .

It is an emirp because it is prime and its reverse (9291208193) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3918021929 is a prime.

It is a super-2 number, since 2×3918021929² = 30701791672249762082, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3918021929.

It is not a weakly prime, because it can be changed into another prime (3918021923) 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, 1959010964 + 1959010965.

It is an arithmetic number, because the mean of its divisors is an integer number (1959010965).

Almost surely, 2^3918021929 is an apocalyptic number.

It is an amenable number.

3918021929 is a deficient number, since it is larger than the sum of its proper divisors (1).

3918021929 is an equidigital number, since it uses as much as digits as its factorization.

3918021929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 3918021929 is about 62594.1045866142. The cubic root of 3918021929 is about 1576.4817739188.

The spelling of 3918021929 in words is "three billion, nine hundred eighteen million, twenty-one thousand, nine hundred twenty-nine".