83890237 has 2 divisors, whose sum is σ = 83890238. Its totient is φ = 83890236.

The previous prime is 83890217. The next prime is 83890249. The reversal of 83890237 is 73209838.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81613156 + 2277081 = 9034^2 + 1509^2 .

It is a cyclic number.

It is not a de Polignac number, because 83890237 - 2⁷ = 83890109 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83890237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83890207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41945118 + 41945119.

It is an arithmetic number, because the mean of its divisors is an integer number (41945119).

Almost surely, 2^83890237 is an apocalyptic number.

It is an amenable number.

83890237 is a deficient number, since it is larger than the sum of its proper divisors (1).

83890237 is an equidigital number, since it uses as much as digits as its factorization.

83890237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 83890237 is about 9159.1613699072. The cubic root of 83890237 is about 437.7610732377.

The spelling of 83890237 in words is "eighty-three million, eight hundred ninety thousand, two hundred thirty-seven".