83421487 has 4 divisors (see below), whose sum is σ = 86298120. Its totient is φ = 80544856.

The previous prime is 83421469. The next prime is 83421497. The reversal of 83421487 is 78412438.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 83421487 - 2¹¹ = 83419439 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 (83421497) 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, 1438273 + ... + 1438330.

It is an arithmetic number, because the mean of its divisors is an integer number (21574530).

Almost surely, 2^83421487 is an apocalyptic number.

83421487 is a deficient number, since it is larger than the sum of its proper divisors (2876633).

83421487 is a wasteful number, since it uses less digits than its factorization.

83421487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2876632.

The product of its digits is 43008, while the sum is 37.

The square root of 83421487 is about 9133.5363906868. The cubic root of 83421487 is about 436.9441967330.

The spelling of 83421487 in words is "eighty-three million, four hundred twenty-one thousand, four hundred eighty-seven".