3918619949 has 2 divisors, whose sum is σ = 3918619950. Its totient is φ = 3918619948.

The previous prime is 3918619921. The next prime is 3918619951. The reversal of 3918619949 is 9499168193.

3918619949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3113082025 + 805537924 = 55795^2 + 28382^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3918619949 is a prime.

Together with 3918619951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3918619249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1959309974 + 1959309975.

It is an arithmetic number, because the mean of its divisors is an integer number (1959309975).

Almost surely, 2^3918619949 is an apocalyptic number.

It is an amenable number.

3918619949 is a deficient number, since it is larger than the sum of its proper divisors (1).

3918619949 is an equidigital number, since it uses as much as digits as its factorization.

3918619949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3779136, while the sum is 59.

The square root of 3918619949 is about 62598.8813717945. The cubic root of 3918619949 is about 1576.5619776275.

The spelling of 3918619949 in words is "three billion, nine hundred eighteen million, six hundred nineteen thousand, nine hundred forty-nine".