83929421 has 8 divisors (see below), whose sum is σ = 86089344. Its totient is φ = 81779040.

The previous prime is 83929397. The next prime is 83929423. The reversal of 83929421 is 12492938.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83929421 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 (83929423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17516 + ... + 21786.

It is an arithmetic number, because the mean of its divisors is an integer number (10761168).

Almost surely, 2^83929421 is an apocalyptic number.

It is an amenable number.

83929421 is a deficient number, since it is larger than the sum of its proper divisors (2159923).

83929421 is a wasteful number, since it uses less digits than its factorization.

83929421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4771.

The product of its digits is 31104, while the sum is 38.

The square root of 83929421 is about 9161.3001806512. The cubic root of 83929421 is about 437.8292200627.

The spelling of 83929421 in words is "eighty-three million, nine hundred twenty-nine thousand, four hundred twenty-one".