83730391 has 2 divisors, whose sum is σ = 83730392. Its totient is φ = 83730390.

The previous prime is 83730379. The next prime is 83730433. The reversal of 83730391 is 19303738.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 83730391 - 2¹¹ = 83728343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83730191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41865195 + 41865196.

It is an arithmetic number, because the mean of its divisors is an integer number (41865196).

Almost surely, 2^83730391 is an apocalyptic number.

83730391 is a deficient number, since it is larger than the sum of its proper divisors (1).

83730391 is an equidigital number, since it uses as much as digits as its factorization.

83730391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 83730391 is about 9150.4311920259. The cubic root of 83730391 is about 437.4828571242.

The spelling of 83730391 in words is "eighty-three million, seven hundred thirty thousand, three hundred ninety-one".