9942420919 has 2 divisors, whose sum is σ = 9942420920. Its totient is φ = 9942420918.

The previous prime is 9942420883. The next prime is 9942420949. The reversal of 9942420919 is 9190242499.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9942420919 is a prime.

It is a super-2 number, since 2×9942420919² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9942420949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4971210459 + 4971210460.

It is an arithmetic number, because the mean of its divisors is an integer number (4971210460).

Almost surely, 2^9942420919 is an apocalyptic number.

9942420919 is a deficient number, since it is larger than the sum of its proper divisors (1).

9942420919 is an equidigital number, since it uses as much as digits as its factorization.

9942420919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 9942420919 is about 99711.6889787752. The cubic root of 9942420919 is about 2150.2917158891.

The spelling of 9942420919 in words is "nine billion, nine hundred forty-two million, four hundred twenty thousand, nine hundred nineteen".