827101421 has 4 divisors (see below), whose sum is σ = 853782144. Its totient is φ = 800420700.

The previous prime is 827101417. The next prime is 827101439. The reversal of 827101421 is 124101728.

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 827101421 - 2² = 827101417 is a prime.

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 (827101621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13340315 + ... + 13340376.

It is an arithmetic number, because the mean of its divisors is an integer number (213445536).

Almost surely, 2^827101421 is an apocalyptic number.

It is an amenable number.

827101421 is a deficient number, since it is larger than the sum of its proper divisors (26680723).

827101421 is a wasteful number, since it uses less digits than its factorization.

827101421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26680722.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 827101421 is about 28759.3710118980. The cubic root of 827101421 is about 938.6843753693.

The spelling of 827101421 in words is "eight hundred twenty-seven million, one hundred one thousand, four hundred twenty-one".