83877421 has 4 divisors (see below), whose sum is σ = 84008512. Its totient is φ = 83746332.

The previous prime is 83877401. The next prime is 83877449. The reversal of 83877421 is 12477838.

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 83877421 - 2⁷ = 83877293 is a prime.

It is a super-2 number, since 2×83877421² = 14070843507222482, which 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 (83877401) 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, 64581 + ... + 65866.

It is an arithmetic number, because the mean of its divisors is an integer number (21002128).

Almost surely, 2^83877421 is an apocalyptic number.

It is an amenable number.

83877421 is a deficient number, since it is larger than the sum of its proper divisors (131091).

83877421 is a wasteful number, since it uses less digits than its factorization.

83877421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131090.

The product of its digits is 75264, while the sum is 40.

The square root of 83877421 is about 9158.4617158123. The cubic root of 83877421 is about 437.7387796954.

The spelling of 83877421 in words is "eighty-three million, eight hundred seventy-seven thousand, four hundred twenty-one".