83972389 has 2 divisors, whose sum is σ = 83972390. Its totient is φ = 83972388.

The previous prime is 83972341. The next prime is 83972431. The reversal of 83972389 is 98327938.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57532225 + 26440164 = 7585^2 + 5142^2 .

It is a cyclic number.

It is not a de Polignac number, because 83972389 - 2¹³ = 83964197 is a prime.

It is a super-2 number, since 2×83972389² = 14102724228734642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83970389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41986194 + 41986195.

It is an arithmetic number, because the mean of its divisors is an integer number (41986195).

Almost surely, 2^83972389 is an apocalyptic number.

It is an amenable number.

83972389 is a deficient number, since it is larger than the sum of its proper divisors (1).

83972389 is an equidigital number, since it uses as much as digits as its factorization.

83972389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 49.

The square root of 83972389 is about 9163.6449625681. The cubic root of 83972389 is about 437.9039234512.

The spelling of 83972389 in words is "eighty-three million, nine hundred seventy-two thousand, three hundred eighty-nine".