491937403 has 2 divisors, whose sum is σ = 491937404. Its totient is φ = 491937402.

The previous prime is 491937377. The next prime is 491937463. The reversal of 491937403 is 304739194.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 491937403 - 2⁵ = 491937371 is a prime.

It is not a weakly prime, because it can be changed into another prime (491937463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245968701 + 245968702.

It is an arithmetic number, because the mean of its divisors is an integer number (245968702).

Almost surely, 2^491937403 is an apocalyptic number.

491937403 is a deficient number, since it is larger than the sum of its proper divisors (1).

491937403 is an equidigital number, since it uses as much as digits as its factorization.

491937403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 491937403 is about 22179.6619225812. The cubic root of 491937403 is about 789.4111956136.

The spelling of 491937403 in words is "four hundred ninety-one million, nine hundred thirty-seven thousand, four hundred three".