83470421 has 2 divisors, whose sum is σ = 83470422. Its totient is φ = 83470420.

The previous prime is 83470403. The next prime is 83470433. The reversal of 83470421 is 12407438.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72012196 + 11458225 = 8486^2 + 3385^2 .

It is a cyclic number.

It is not a de Polignac number, because 83470421 - 2²⁶ = 16361557 is a prime.

It is a super-2 number, since 2×83470421² = 13934622363834482, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83470451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41735210 + 41735211.

It is an arithmetic number, because the mean of its divisors is an integer number (41735211).

Almost surely, 2^83470421 is an apocalyptic number.

It is an amenable number.

83470421 is a deficient number, since it is larger than the sum of its proper divisors (1).

83470421 is an equidigital number, since it uses as much as digits as its factorization.

83470421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 83470421 is about 9136.2148070194. The cubic root of 83470421 is about 437.0296153654.

Adding to 83470421 its reverse (12407438), we get a palindrome (95877859).

The spelling of 83470421 in words is "eighty-three million, four hundred seventy thousand, four hundred twenty-one".