9876542309 has 16 divisors (see below), whose sum is σ = 11264209920. Its totient is φ = 8604583680.

The previous prime is 9876542303. The next prime is 9876542329. The reversal of 9876542309 is 9032456789.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9876542309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9876542303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 395294 + ... + 419535.

It is an arithmetic number, because the mean of its divisors is an integer number (704013120).

Almost surely, 2^9876542309 is an apocalyptic number.

It is an amenable number.

9876542309 is a deficient number, since it is larger than the sum of its proper divisors (1387667611).

9876542309 is a wasteful number, since it uses less digits than its factorization.

9876542309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814900.

The product of its (nonzero) digits is 3265920, while the sum is 53.

The square root of 9876542309 is about 99380.7944675429. The cubic root of 9876542309 is about 2145.5319005563.

The spelling of 9876542309 in words is "nine billion, eight hundred seventy-six million, five hundred forty-two thousand, three hundred nine".