990429403 has 2 divisors, whose sum is σ = 990429404. Its totient is φ = 990429402.

The previous prime is 990429383. The next prime is 990429409. The reversal of 990429403 is 304924099.

It is a strong prime.

It is an emirp because it is prime and its reverse (304924099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 990429403 - 2⁵ = 990429371 is a prime.

It is not a weakly prime, because it can be changed into another prime (990429409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495214701 + 495214702.

It is an arithmetic number, because the mean of its divisors is an integer number (495214702).

Almost surely, 2^990429403 is an apocalyptic number.

990429403 is a deficient number, since it is larger than the sum of its proper divisors (1).

990429403 is an equidigital number, since it uses as much as digits as its factorization.

990429403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 990429403 is about 31471.0883669440. The cubic root of 990429403 is about 996.7995691696.

The spelling of 990429403 in words is "nine hundred ninety million, four hundred twenty-nine thousand, four hundred three".