8501077421 has 4 divisors (see below), whose sum is σ = 8501912832. Its totient is φ = 8500242012.

The previous prime is 8501077379. The next prime is 8501077423. The reversal of 8501077421 is 1247701058.

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 8501077421 - 2¹⁸ = 8500815277 is a prime.

It is a super-2 number, since 2×8501077421² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8501077423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402251 + ... + 422856.

It is an arithmetic number, because the mean of its divisors is an integer number (2125478208).

Almost surely, 2^8501077421 is an apocalyptic number.

It is an amenable number.

8501077421 is a deficient number, since it is larger than the sum of its proper divisors (835411).

8501077421 is a wasteful number, since it uses less digits than its factorization.

8501077421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835410.

The product of its (nonzero) digits is 15680, while the sum is 35.

The square root of 8501077421 is about 92201.2875235482. The cubic root of 8501077421 is about 2040.9137759611.

Adding to 8501077421 its reverse (1247701058), we get a palindrome (9748778479).

The spelling of 8501077421 in words is "eight billion, five hundred one million, seventy-seven thousand, four hundred twenty-one".