1633224994 has 4 divisors (see below), whose sum is σ = 2449837494. Its totient is φ = 816612496.

The previous prime is 1633224991. The next prime is 1633225001. The reversal of 1633224994 is 4994223361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1632564025 + 660969 = 40405^2 + 813^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1633224994.

It is not an unprimeable number, because it can be changed into a prime (1633224991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408306247 + ... + 408306250.

Almost surely, 2^1633224994 is an apocalyptic number.

1633224994 is a deficient number, since it is larger than the sum of its proper divisors (816612500).

1633224994 is an equidigital number, since it uses as much as digits as its factorization.

1633224994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816612499.

The product of its digits is 279936, while the sum is 43.

The square root of 1633224994 is about 40413.1784694052. The cubic root of 1633224994 is about 1177.6475669987.

The spelling of 1633224994 in words is "one billion, six hundred thirty-three million, two hundred twenty-four thousand, nine hundred ninety-four".