9642920709 has 8 divisors (see below), whose sum is σ = 12864470080. Its totient is φ = 6424992576.

The previous prime is 9642920701. The next prime is 9642920711. The reversal of 9642920709 is 9070292469.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9642920709 - 2³ = 9642920701 is a prime.

It is a super-2 number, since 2×9642920709² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9642920701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 899089 + ... + 909750.

It is an arithmetic number, because the mean of its divisors is an integer number (1608058760).

Almost surely, 2^9642920709 is an apocalyptic number.

It is an amenable number.

9642920709 is a deficient number, since it is larger than the sum of its proper divisors (3221549371).

9642920709 is a wasteful number, since it uses less digits than its factorization.

9642920709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810619.

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 9642920709 is about 98198.3742686202. The cubic root of 9642920709 is about 2128.4797949462.

The spelling of 9642920709 in words is "nine billion, six hundred forty-two million, nine hundred twenty thousand, seven hundred nine".