83387421 has 16 divisors (see below), whose sum is σ = 133040320. Its totient is φ = 51315120.

The previous prime is 83387413. The next prime is 83387429. The reversal of 83387421 is 12478338.

It is an interprime number because it is at equal distance from previous prime (83387413) and next prime (83387429).

It is not a de Polignac number, because 83387421 - 2³ = 83387413 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 (83387429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118435 + ... + 119136.

It is an arithmetic number, because the mean of its divisors is an integer number (8315020).

Almost surely, 2^83387421 is an apocalyptic number.

It is an amenable number.

83387421 is a deficient number, since it is larger than the sum of its proper divisors (49652899).

83387421 is a wasteful number, since it uses less digits than its factorization.

83387421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237593 (or 237587 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 83387421 is about 9131.6713147156. The cubic root of 83387421 is about 436.8847117884.

The spelling of 83387421 in words is "eighty-three million, three hundred eighty-seven thousand, four hundred twenty-one".