9687401509 has 4 divisors (see below), whose sum is σ = 9687768300. Its totient is φ = 9687034720.

The previous prime is 9687401497. The next prime is 9687401551. The reversal of 9687401509 is 9051047869.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6565050625 + 3122350884 = 81025^2 + 55878^2 .

It is a cyclic number.

It is not a de Polignac number, because 9687401509 - 2⁹ = 9687400997 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9687401209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140422 + ... + 197719.

It is an arithmetic number, because the mean of its divisors is an integer number (2421942075).

Almost surely, 2^9687401509 is an apocalyptic number.

It is an amenable number.

9687401509 is a deficient number, since it is larger than the sum of its proper divisors (366791).

9687401509 is a wasteful number, since it uses less digits than its factorization.

9687401509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366790.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 9687401509 is about 98424.5980890956. The cubic root of 9687401509 is about 2131.7475214120.

The spelling of 9687401509 in words is "nine billion, six hundred eighty-seven million, four hundred one thousand, five hundred nine".