991703 has 2 divisors, whose sum is σ = 991704. Its totient is φ = 991702.

The previous prime is 991693. The next prime is 991717. The reversal of 991703 is 307199.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 991703 - 2⁸ = 991447 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 991703.

It is not a weakly prime, because it can be changed into another prime (991723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495851 + 495852.

It is an arithmetic number, because the mean of its divisors is an integer number (495852).

2⁹⁹¹⁷⁰³ is an apocalyptic number.

991703 is a deficient number, since it is larger than the sum of its proper divisors (1).

991703 is an equidigital number, since it uses as much as digits as its factorization.

991703 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1701, while the sum is 29.

The square root of 991703 is about 995.8428590897. The cubic root of 991703 is about 99.7226648968.

The spelling of 991703 in words is "nine hundred ninety-one thousand, seven hundred three".