9681026621 has 4 divisors (see below), whose sum is σ = 11064030432. Its totient is φ = 8298022812.

The previous prime is 9681026603. The next prime is 9681026681. The reversal of 9681026621 is 1266201869.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9681026621 - 2¹⁴ = 9681010237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9681026681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 691501895 + ... + 691501908.

It is an arithmetic number, because the mean of its divisors is an integer number (2766007608).

Almost surely, 2^9681026621 is an apocalyptic number.

It is an amenable number.

9681026621 is a deficient number, since it is larger than the sum of its proper divisors (1383003811).

9681026621 is a wasteful number, since it uses less digits than its factorization.

9681026621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1383003810.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 9681026621 is about 98392.2081315385. The cubic root of 9681026621 is about 2131.2798131312.

The spelling of 9681026621 in words is "nine billion, six hundred eighty-one million, twenty-six thousand, six hundred twenty-one".