83570421 has 8 divisors (see below), whose sum is σ = 121557024. Its totient is φ = 50648720.

The previous prime is 83570407. The next prime is 83570437. The reversal of 83570421 is 12407538.

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

It is a cyclic number.

It is not a de Polignac number, because 83570421 - 2¹³ = 83562229 is a prime.

It is a super-2 number, since 2×83570421² = 13968030532234482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83570401) 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, 1266186 + ... + 1266251.

It is an arithmetic number, because the mean of its divisors is an integer number (15194628).

Almost surely, 2^83570421 is an apocalyptic number.

It is an amenable number.

83570421 is a deficient number, since it is larger than the sum of its proper divisors (37986603).

83570421 is a wasteful number, since it uses less digits than its factorization.

83570421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2532451.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 83570421 is about 9141.6858948446. The cubic root of 83570421 is about 437.2040704604.

Adding to 83570421 its reverse (12407538), we get a palindrome (95977959).

The spelling of 83570421 in words is "eighty-three million, five hundred seventy thousand, four hundred twenty-one".