3942629981 has 2 divisors, whose sum is σ = 3942629982. Its totient is φ = 3942629980.

The previous prime is 3942629969. The next prime is 3942629993. The reversal of 3942629981 is 1899262493.

3942629981 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (3942629969) and next prime (3942629993).

It can be written as a sum of positive squares in only one way, i.e., 3798749956 + 143880025 = 61634^2 + 11995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3942629981 is a prime.

It is a super-2 number, since 2×3942629981² = 31088662334160120722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3942629281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1971314990 + 1971314991.

It is an arithmetic number, because the mean of its divisors is an integer number (1971314991).

Almost surely, 2^3942629981 is an apocalyptic number.

It is an amenable number.

3942629981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3942629981 is an equidigital number, since it uses as much as digits as its factorization.

3942629981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 53.

The square root of 3942629981 is about 62790.3653517003. The cubic root of 3942629981 is about 1579.7753754539.

The spelling of 3942629981 in words is "three billion, nine hundred forty-two million, six hundred twenty-nine thousand, nine hundred eighty-one".