83742421 has 8 divisors (see below), whose sum is σ = 97659200. Its totient is φ = 71778924.

The previous prime is 83742409. The next prime is 83742467. The reversal of 83742421 is 12424738.

It is not a de Polignac number, because 83742421 - 2⁹ = 83741909 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 (83742721) 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, 121731 + ... + 122416.

It is an arithmetic number, because the mean of its divisors is an integer number (12207400).

Almost surely, 2^83742421 is an apocalyptic number.

It is an amenable number.

83742421 is a deficient number, since it is larger than the sum of its proper divisors (13916779).

83742421 is an equidigital number, since it uses as much as digits as its factorization.

83742421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244168 (or 244154 counting only the distinct ones).

The product of its digits is 10752, while the sum is 31.

The square root of 83742421 is about 9151.0885144883. The cubic root of 83742421 is about 437.5038079669.

The spelling of 83742421 in words is "eighty-three million, seven hundred forty-two thousand, four hundred twenty-one".