999402422 has 4 divisors (see below), whose sum is σ = 1499103636. Its totient is φ = 499701210.

The previous prime is 999402421. The next prime is 999402491. The reversal of 999402422 is 224204999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 224204999 = 53 ⋅4230283.

It is a self number, because there is not a number n which added to its sum of digits gives 999402422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999402421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249850604 + ... + 249850607.

It is an arithmetic number, because the mean of its divisors is an integer number (374775909).

Almost surely, 2^999402422 is an apocalyptic number.

999402422 is a deficient number, since it is larger than the sum of its proper divisors (499701214).

999402422 is a wasteful number, since it uses less digits than its factorization.

999402422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499701213.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 999402422 is about 31613.3266519043. The cubic root of 999402422 is about 999.8007676424.

The spelling of 999402422 in words is "nine hundred ninety-nine million, four hundred two thousand, four hundred twenty-two".