9628686973 has 2 divisors, whose sum is σ = 9628686974. Its totient is φ = 9628686972.

The previous prime is 9628686961. The next prime is 9628686983. The reversal of 9628686973 is 3796868269.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9627141924 + 1545049 = 98118^2 + 1243^2 .

It is an emirp because it is prime and its reverse (3796868269) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9628686973 - 2¹³ = 9628678781 is a prime.

It is a super-3 number, since 3×9628686973³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9628686983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4814343486 + 4814343487.

It is an arithmetic number, because the mean of its divisors is an integer number (4814343487).

Almost surely, 2^9628686973 is an apocalyptic number.

It is an amenable number.

9628686973 is a deficient number, since it is larger than the sum of its proper divisors (1).

9628686973 is an equidigital number, since it uses as much as digits as its factorization.

9628686973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47029248, while the sum is 64.

The square root of 9628686973 is about 98125.8731069436. The cubic root of 9628686973 is about 2127.4320094188.

The spelling of 9628686973 in words is "nine billion, six hundred twenty-eight million, six hundred eighty-six thousand, nine hundred seventy-three".