990619822 has 4 divisors (see below), whose sum is σ = 1485929736. Its totient is φ = 495309910.

The previous prime is 990619813. The next prime is 990619823. The reversal of 990619822 is 228916099.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 228916099 = 89 ⋅2572091.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990619823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247654954 + ... + 247654957.

It is an arithmetic number, because the mean of its divisors is an integer number (371482434).

Almost surely, 2^990619822 is an apocalyptic number.

990619822 is a deficient number, since it is larger than the sum of its proper divisors (495309914).

990619822 is a wasteful number, since it uses less digits than its factorization.

990619822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495309913.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 990619822 is about 31474.1135220676. The cubic root of 990619822 is about 996.8634463168.

The spelling of 990619822 in words is "nine hundred ninety million, six hundred nineteen thousand, eight hundred twenty-two".