983021491 has 2 divisors, whose sum is σ = 983021492. Its totient is φ = 983021490.

The previous prime is 983021489. The next prime is 983021503. The reversal of 983021491 is 194120389.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 983021491 - 2¹ = 983021489 is a prime.

Together with 983021489, it forms a pair of twin primes.

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 983021491.

It is not a weakly prime, because it can be changed into another prime (983021401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 491510745 + 491510746.

It is an arithmetic number, because the mean of its divisors is an integer number (491510746).

Almost surely, 2^983021491 is an apocalyptic number.

983021491 is a deficient number, since it is larger than the sum of its proper divisors (1).

983021491 is an equidigital number, since it uses as much as digits as its factorization.

983021491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 983021491 is about 31353.1735395318. The cubic root of 983021491 is about 994.3081614400.

The spelling of 983021491 in words is "nine hundred eighty-three million, twenty-one thousand, four hundred ninety-one".