8420761999 has 8 divisors (see below), whose sum is σ = 9289696752. Its totient is φ = 7583424960.

The previous prime is 8420761991. The next prime is 8420762017. The reversal of 8420761999 is 9991670248.

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

It is a cyclic number.

It is not a de Polignac number, because 8420761999 - 2³ = 8420761991 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 (8420761991) 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, 7898869 + ... + 7899934.

It is an arithmetic number, because the mean of its divisors is an integer number (1161212094).

Almost surely, 2^8420761999 is an apocalyptic number.

8420761999 is a deficient number, since it is larger than the sum of its proper divisors (868934753).

8420761999 is a wasteful number, since it uses less digits than its factorization.

8420761999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15798857.

The product of its (nonzero) digits is 1959552, while the sum is 55.

The square root of 8420761999 is about 91764.7099870097. The cubic root of 8420761999 is about 2034.4661309257.

The spelling of 8420761999 in words is "eight billion, four hundred twenty million, seven hundred sixty-one thousand, nine hundred ninety-nine".