9978030494 has 4 divisors (see below), whose sum is σ = 14967045744. Its totient is φ = 4989015246.

The previous prime is 9978030467. The next prime is 9978030523. The reversal of 9978030494 is 4940308799.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4940308799 = 73 ⋅67675463.

It is a super-2 number, since 2×9978030494² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2494507622 + ... + 2494507625.

It is an arithmetic number, because the mean of its divisors is an integer number (3741761436).

Almost surely, 2^9978030494 is an apocalyptic number.

9978030494 is a deficient number, since it is larger than the sum of its proper divisors (4989015250).

9978030494 is a wasteful number, since it uses less digits than its factorization.

9978030494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4989015249.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The square root of 9978030494 is about 99890.0920712360. The cubic root of 9978030494 is about 2152.8558043605.

The spelling of 9978030494 in words is "nine billion, nine hundred seventy-eight million, thirty thousand, four hundred ninety-four".