999997403 has 2 divisors, whose sum is σ = 999997404. Its totient is φ = 999997402.

The previous prime is 999997357. The next prime is 999997457. The reversal of 999997403 is 304799999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999997403 - 2²² = 995803099 is a prime.

It is not a weakly prime, because it can be changed into another prime (999937403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499998701 + 499998702.

It is an arithmetic number, because the mean of its divisors is an integer number (499998702).

Almost surely, 2^999997403 is an apocalyptic number.

999997403 is a deficient number, since it is larger than the sum of its proper divisors (1).

999997403 is an equidigital number, since it uses as much as digits as its factorization.

999997403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4960116, while the sum is 59.

The square root of 999997403 is about 31622.7355394817. The cubic root of 999997403 is about 999.9991343326. Note that the first 3 decimals are identical.

The spelling of 999997403 in words is "nine hundred ninety-nine million, nine hundred ninety-seven thousand, four hundred three".